pentair mastertemp 400 won't turn off

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Worked for 1 weekend, now won't fire up. Test the resistance of the pressure switch. We have a Pentair pool heater that all the sudden kicked off Saturday. Not only for Pentair, but it also happens to other brands too. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. Even if they are fixed somehow, they will stop working after a while. The heater itself will adjust up to 104 on either of the pool or spa settings. You may need to replace it. Bought the house 2.5 years ago. I do not have it connected to a spa. The LED on the back panel indicated HLS. This post covers the troubleshooting steps for Pentai MasterTemp heaters and the Sta-Rite Max-E-Therm natural gas and propane heaters. Solution: Replace the thermal governor with a new one. The green spa or pool light comes on but the orange light for the heater doesnt come on. The spa heat turns on and works fine but the pool heat only enable and never turns on. ******************************************************** $4100 is not cheap. Same issue continues. The consent submitted will only be used for data processing originating from this website. An HVAC company would install it as well, or an Appliance company. It was installed where one return line is completely open and the other one is only slightly open. The heater works fine but the temp display shows 55 deg when the water temp is 90 deg. Replace the bad ones. Is there a bypass valve open? When the heater tries but fails to start, it recycles. If you have a Pentair MiniMax NT and are experiencing technical issues, this blog is for you. mike61953. Thermal Governors stop working primarily due to years of usage. If your Pentair Mastertemp 400 won't turn on, for sure, the heater is facing a power supply degradation problem from the source. Still have the power light lit but no other lights are lit. Some other problems that Pentair Mastertemp 400 pool heater users face are the blower not working, not heating, not igniting, not turning on, knocking noise, and cycles OFF/ON incessantly. You need to take apart the filter cover and get the elements out. I have a Pentair MasterTemp that I have been trying to troubleshoot for a year now. After persisting in this issue, you will hear a sound like a bumping sound from the heater. The controls and circuit boards for the Max-E-Therm and the MasterTemp are fairly identical. Tech did everything but change the Regulator. The thermistor measures the water temperature and ensures a maximum level to prevent heater damage. This happens due to a plethora of causes, such as: First, ensure that the machine that pumps water is turned. Replace the bad board. Submit a Support Request. Have a BRAND new Pentair Mastertemp 400. Eco-friendly, MasterTemp is certified for low NOx emissions and outperforms industry standards. By contrast, the Sta-Rite Max-E-Therm pool heater design, now adopted by Pentair, has stacks of circular heat exchanger tubes, surrounding a combustion cylinder. "mainEntityOfPage": "https://blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/",
Required fields are marked *. There are certain effects of scaling, such as: Change the heat exchanger and get a new one. Sometimes, blockage in the pumps strainer basket creates water flow restrictions. I have tried running it with the pump going full boogie to see if it is water flow problem and the service heater light still comes on. Thanks for the help. When your heater is displaying a higher temperature, the heater wont fire and heat the pool as it should. I dont see my trouble addressed. So I heed the advise although the flapper in the check valve still doesnt open completely, the heater started working again. Also check that the blower comes on. Step 1: Take off the left side panel of the heater. It worked well as usual, heated water to 85F as commanded. The biggest fear about theheat exchangeris that corrosion can occur to the relatively soft copper finned tubes, causing them to develop pinhole leaks. Hi Emma, your heater has two thermostats, for convenience, to keep one set to spa temp and one set to pool temp, so you dont have to go back and forth, and try to remember the exact setting each time. "@type": "ImageObject",
Be sure the heater is turned off at the breaker, and youre wearing proper protective gear. Advice? All Rights Reserved. You might also bring the heat exchanger in for maintenance. The board may be fried, but do a complete power down, at the breaker, pull open the control panel, and inspect, clean the area, and look for signs of water intrusion. Now, we make a living selling to DIY people, who like to save money. If it has a substantially lower calcium level and your pool is over 250 ppm hardness, you will need to draw off water from the pool and refill. "keywords": "",
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Use a heat exchanger made of cupro-nickel to resist corrosion. Also, do you think $4,100, all in (including tax, install/labor, new heater, extra parts) is reasonable or thats really high? I designed my home myself with the help of my beloved wife. "height": "219",
Hopefully, now you have a crystal clear idea of each of the Pentair Mastertemp 400 problems. Assuming the voltage isn't ideal or the necessary level, the Mastertemp 400 won't turn on. I think our heat exchanger corroded last summer. Now check out the heat exchanger as well. A pool technician replaced 3 sensors however it still does not work. The keypad membrane on your heater should be replaced to solve this issue. Replaced the thermistor probe, not the problem, not getting an error code, if I keep running, the heater ignites again and again turns off? Education Center. },
If the thermistor tests are bad or faulty, replace them with a new one. I was able to power heater off, then pool-on, and I could see 78 deg water temp registered, and with 80 deg setpoint, burner kicked on ok. 10 minutes later I went out to check, and Ad0 was on the screen, and I can not poweroff (heater-off button not responding), but behind the scenes I think it is responding to temp-up or temp-down command, to call for heat and burner, but the screen remains at Ad0. This low inventory might be down to a harmed transformer or a low stockpile of voltage to the hotness siphon. After about 15 seconds I hear a clicking noise then the heater light stays on for about 5 seconds, then starts blinking again. It 'rattles' 3 times, doesn't - Answered by a verified Pool and Spa Expert . Maintenance goes a long way when it comes to heater shelf life. Ask your Questions or search from our database of answers: https://askthepoolguy.com/questions/ask/ Make sure you Subscribe so you get your answer! Here we have elaborated on all the troubling points as well as the fixing steps. Reduce strength of exhaust vent and/or number of elbows. Ensure that the burner flame holder is grounded properly. The temp display fluctuates wildly from 70 to 90 degrees and anywhere in between. Ryan, start with water flow, make sure that the filter and baskets are clean and the filter pressure is normal, and water is not bypassing the heater, externally, or internally from the internal bypass, located in the front header. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. I only own a pool. Table of Contents. And if the heayer shuts off, the gas valve is ok. Then check the control board & fix it. 2. Repair or replace the pilot lit. Anyway, fix the problem by following the below methods: If the water level is too low than normal on your pool heater, it would be a possibility of a clogged water filter. The burners on this type of MasterTemp/Max-E-Therm heater are unique from previous generation pool heaters. Then i see a R9 code. "contentUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
The wiring diagram is given below for your reference. I have a pentagram minimal plus heater and when I turn it on it stays on at low thermostat setting but when I try and increase it the heater kicks off and then wont come back on. I replaced the thermistor and still have the same problem. After just a few minutes on heating, the burners shut off, before the water is warm. It should be damaged and crack-free for fluent water flowing. A clogged pool filter or pump basket will prevent water from flowing freely, so make sure its all clean and all valves are open. Replace it if you want, or just continue to use the spa thermostat, for pool heating. Note: Turn off power to unit prior to attempting service or repair. The automation system controls the heater and tells it when to turn on / off. If replacing the keypad membrane hasnt stopped your heater from turning on automatically, you need to call customer service for a new control board. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Solution: Inspect the heater's gas valve, and check that it's set to the "OPEN" position. If damaged, broken, or open, then replace it. This issue should be checked ASAP. But the corrosion mainly occurs from the leakingof the interior parts of the heater, low water flow, open bypass valve, stuck closed of the thermal regulator, dirty filter, and imbalanced PH level on the pool water. Is enough water getting into the heater? filter should be backwashed. Replace with new igniter. Pentair Mastertemp 400 Low Water Circulation, 6. Save money and energy with the MasterTemp High-Performance Heater. Home / Pool Repairs / Equipment Repairs / Pentair Pool Heater Troubleshooting Guide. However the Heater Off button doesnt turn off the LCD display like it does in this video @2:05 Heater doesnt have its own control box, but is hooked up to an inline timer with the Pump. Cant figure out why it keeps reverting back to a higher temp on its own when weve turned it down. Pentair MasterTemp 400 natural gas heater won't ignite. Solution. Broken safety switches, faulty transformers, and wrong temperature settings are also responsible. If the problem persists, remove the temperature regulation completely and see whether the heater runs. Find a Dealer. Solution: Servicing on the pump or on the filter will fix this issue. "primaryImageOfPage": {
Unscrew them to take the ICM off the heater. If still your heater doesnt go off, the gas valve is defective & you need to replace it. Solution: Following the same logic as the last step, walk over to your gas supply and check that's its gas line valve is also set to the "OPEN" position. Step 3: Two mounting screws hold the ICM in place. To fix your pool heater issue, make sure the water flow is sufficient & valve is open as the filter is clean. Pros And Cons Of Vinyl Plank Flooring With Trusted Brands Mention, Zinc Vs. Copper Roof Strips: Key Features With Pros And Cons of Each. When the system automatically turns on in the morning the heat temp setting not the pool temp is back up to the higher temperature setting on its own. Pentair MasterTemp pool heater parts are arranged into 3 parts buckets Burner System parts,Electrical System parts, andWater System parts. . Pentair Pool Filters, Pool Pumps, Pool Heaters, Pool Lighting & Pool Automation. So I thought that was causing the problem. in 1995. Then, replace the faulty heater part or parts. Test your control panel with a multimeter. Any help would be greatly appreciated. Ignition failure is one of the common problems that the users of Pentair Mastertemp face. It can even be dangerous. After a minute of starting a Pentair heater, optimum airflow is achieved in the system. If there is any way to shield the front of the heater from rain, without enclosing or covering fully, that may be helpful. Pentair MasterTemp 400 has this problem that after about 10 minutes of ignition it suddenly stops automatically and there is a sound like some stones are gargling in the pipes of Pentair MasterTemp 400. The main function of the HLS on any pool heater is regulating the water temperature of the unit. Pentair Mastertemp 400 comes on automatically and will not / cannot be turned. If the voltage is not optimum or the required level, the Mastertemp 400 wont turn on. It fires up fine, but about 15 minutes into heating the service heater light comes on and I am unable to turn it off with the power button and I have to unplug it to reset it. Along with the fluctuation the heater cycles. you won't get any ignition in your heater. Im so glad I didnt have to buy additional parts. Replace the bad switches. Check the wire going to the sensor and the sensor itself. Hopefully, you will . Would this be caused by too high of a gas/air mixture? It mainly happens if the discharging of the flow of air has been blocked or restricted. Continue with Recommended Cookies. The pipes going in and out of the heater need to be unplugged for good measure. Thank you Frank It fires up fine again then the same thing happens. "
Not sure why a pool tech wouldn't replace the 2 wire remote . Problems and Corrective Action. Measure the voltage of the heater transformer. Hi Hugh, is it a Hayward heater? Heater will not start. First, locate the thermistor of your pool heater. Change the waters chemicals to achieve equilibrium. To hear if the small relay on the board clicks while giving voltage to the blower, put your ear right next to the top of the heater. Voltage checks have the potential for a lot of danger. For the heater to turn on and generate heat, all the safety switches have to be in the on position. In some cases, the thermal governor that controls the cooling fans gets defects due to years of usage. This error code should not be shown on your Pentair heater at this point. For a better experience, please enable JavaScript in your browser before proceeding. Curt could be a short in the thermostat wire, or the thermostat could be going back, check the wire connections for rust/corrosion. Now, measure the voltage reading on the water pressure switch. COPYRIGHT 2023. Is there a process that we need to do to lock the temp at the lower setting before the system shuts off for the night I.e., when we lower the temp do we need to touch the select button? "height": "219",
This erosion occurs due to a variety of reasons: To solve the problem of saltwater pools, you can use heat exchangers made out of cupro-nickel. MasterTemp is engineered for super-quiet operation and won't intrude on your poolside leisure time. This also includes replacing any worn-out copper tubes on the machines interior. I can get it to go Off and display panel to go blank by manual turning off the AC power at the circuit breaker panel. Hi Lance, those are good ideas, first lets think about flow rate. Enquire about how much voltage is being supplied to the heat pump. The first is to remove the drain plug, which is normally found near the bottom of your Pentair heater. Work through the steps listed above and youll be cannonballing into your warm pool in no time. View online or download Pentair MasterTemp 400 Brochure. Possible Cause: Pilot light isn't lit. Pentair Mastertemp 400 Displaying Wrong Temperature, 3. Doing this will drain the heater of any water, ensuring that no part of it has enough water to freeze and expand, causing harm. "image": {
Heater will Not Fire Troubleshooting. "thumbnailUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
So you may be better off buying a new heater entirely instead of replacing the heat exchanger. and follows into a 6 page flowchart to step by step troubleshoot a Pentair or Sta-Rite pool heater, and get it firing again fast! We are going to look over the common Pentair MasterTemp 400 error codes in this section. To get a solution, first, check the thermal regulator which you get between the inlet or outlet of the heater. Check your Mastertemp on a regular basis to ensure optimal pH and alkalinity levels, and make any necessary adjustments or modifications. Verify pressure tap between gas valve and blower inlet. The heater should be set at 104 and let the automation do the rest. Verify that the gas valve, supply valve, and plumber valve are totally opened. Carlos, those symptoms are HLS when it cools down, it turns back on. Heat pump troubleshooting guide for Pentair pool heaters. They usually cannot be fixed. Frank. I run the heater and this time it did something different. This residue is usually formed at the bottom. See page 16 and verify the gas regulator is -0.2 wc. Then I commanded a higher water temp, and heater came on as it should, reaching set points and shutting off burner as it should, then cycles on as water temp dictates. There are some common temperature issues that users face. Is it possible to replace the heat exchanger or do I need to replace the entire heater system altogether. Frequently Asked Questions. It 'rattles' 3 times, doesn't fire up, then the SERVICE HEATER light comes on. Be sure all connections are clean and tight. Please help. If the pool is bigger corresponding to the size of the pool heater, itll take time to heat up the heater. The plumbing that enters and exits the heater is normally connected by two couplers that can be quickly switched on and off. Clean up all the flue sensor orifices to ensure there is no grime on them. You need to replace the corroded or damaged regulator. Recalled Pool Heater Model Numbers. Ensure that the pool filter is clean and clog-free. I replaced the HLS twice to no avail. It does this over and over . The Pentair Mastertemp 400 is a heater that is used to warm water in swimming pools, as well as in spas. The control board is the culprit when there is no click. Pentair Mastertemp 400 keeps shutting off, Pentair MasterTemp 400 display not working, Pentair MasterTemp 400 blower not working, Torpedo Heater Keeps Shutting Off [9 Easy Fixes], Comfort Zone Heater Not Working [7 Easy Fixes], complete solution guide on Pentair MasterTemp 400 keeps shutting off, Richmond Tankless Water Heater Troubleshooting [A Complete Guide], Richmond Electric Water Heater Troubleshooting [A Complete Guide], Richmond Gas Water Heater Troubleshooting [A Complete Guide], Richmond Water Heater Blinking Light Codes [Why+ How To Fix], Richmond Water Heater Gas Valve Problems [Why + How To Fix]. Be sure water flow is good (inspect internal bypass assy). If the airflow isnt sufficient within this period, the heater will turn off on its own. Adjust the chemical level of the pool water. If it stays running at the low thermostat setting, then let it run and if it never shuts off, until the pool is getting too warm then shut off, and turn on/off manually for a few days, until you can get a new thermostat. Remove the old thermal governor and replace it with a new one. I have seen people are struggling with the DE pool filters. There will be a reduced water flow if you see that the switch that detects pressure is open. Hi Davy I live in Maine, so very short pool season. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. Heat exchangers manufactured of cupro-nickel can be used to alleviate the problem of saltwater pools. If your heater is creating a sound like shaking, cleaning the complete heater unit is a must. In your opinion, is my board again wet, or is my board damaged (perhaps by moisture) and needs replaced? 2. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. The sensor is operating if the resistance is 3.5 ohm or above. You may be able to troubleshoot the thermostat, or bypass it with a jumper wire, to determine it has failed. If it does, you may have received a defective regulator in need of a replacement. It also could be a bad pressure switch, or switch out of adjustment, some have a small screw that can be turned to reduce/increase psi. Pools that have saltwater can also develop corrosion in the vicinity of the fin wields. Your email address will not be published. Any suggestions? we have a Pentair mastertemp 400K; We just had it installed last fall. Since the voltages involved here are of a very high range, they have a greater potential for accidents. "name": "Mark Garcia",
Gas and air are mixed and ignited in the cylinder, which warms the tubes wrapped around the central burner chamber. This could lead to leakage. Pentair Mastertemp 400 Cycles On And Off, 11. Thanks for your help! Reason 3: Bypass Valve has remained opened. The heater does not ignite. I connected my old termistor and got a reading of 85 degrees. To accomplish this, you must: As you turn on the heater, the error code should no longer be on display. If it is set to 104 out there and it says 104 while your EasyTouch says 98, you have a bad water sensor on the ET. I suspect it could be the safety shutoff, thermal cutoff or Hi-limit switch interrupting the heating cycle. This is a very rewarding learning experience for me. In case there is blockage in the heat exchanger, how do I fix that? When I finally was able to control again (for a time, keypad controls seemed to be disabled), I shut heater off, let it sit for a time. Your Pentair MasterTemp 400 wont stay lit? Jeld-Wen Vs. Pella Windows: Which One Is Worthy For Your House? Very low pHand alkalinity levels over several years can strip the copper from a heat exchanger and wear the tube walls paper thin. Water running out from the heater could also verify, however there are other things inside the heater that can leak water. A tough, rustproof composite exterior handles the heat and weathers the elements. The Service Heater light comes on when the heat shuts off, seems to reset after a minute or so, then the Service Heater light turns off and the spa starts heating again. Is this normal? Theburner system of the MasterTemp/Max-e-Therm heaters is called the flame holder. If the thermistor is in good condition, then replace the circuit board. Replace all the defective ones. You will need a screwdriver for this. Pentair Mastertemp 250 turns on automatically. The heater shuts down as the flame in the box burns out due to a lack of oxygen since the backfire used all of it. Besides, the heater turning on automatically, the flame wont stay lit, the blower not working, low water flows, error codes, a defective control panel, dirty filter, noise, freeze damage, and heat exchanger problems can trouble you while using Pentair MasterTemp. Its a fun combination of plumbing, wiring and gas. Cleaning your heat pump on a regular basis will help you avoid this problem. Manage Settings Combustion appears normal, but the flame does not stay lit. Replace it if you find no voltage there. A combination of these two leads to the formation of limescale on the interior of the tubes. Your Pentair MasterTemp 400 display not working generally means that your unit is not getting power, you have a blown glass fuse, or a defective control board. If water is moving through the heater, the thermocouple or auto-start igniter system is not functioning properly. I shouldve tried harder to learn how the pool works. The Mastertemp 400 requires a voltage of 24 VAC. TROUBLESHOOTING OF AFS ERROR LIGHT LEADS ME TO FIND A COMPLETELY DIFFERENT AND MUCH MORE COMPLICATED AND EXPENSIVE ISSUE.DON'T ASSUME YOU HAVE A DEFECTIVE AF. In some cases, the water can become too hot or too cold. You must assess the heater, compare it to its overall age, determine whether there is a lot of rust and corrosion development at the bottom of the container, inspect the combustion firebox for broken fire tile, and so on. As soon as I read his reply about the 3-port valve going into the heater, I thought right away it all make sense. The output of the transformer should be between 24 to 28 volts. Verify that the igniter is dry and not damaged physically. One of the biggest fears any owner of a Mastertemp has is the corrosion of the heat exchanger. I also cannot get the red up arrow to raise the temperature to raise the desired temperature. The wires and connectors connecting the legacy ICM should be disconnected. Safe operation is assured through a series of features . COPYRIGHT 2023. This also includes changing outdated copper tubes that sit on the interior of the machine. Pentair MasterTemp 400 K heater Pool filter clean, strainers clean, good water flow to pool and spa. The thermister, sensors, and Board are working. Look at the blower if you hear a clicking sound. "@type": "Person",
When I hold it, the temp slowly went up to 90. The water inside the equipment can freeze and expand, causing cracks in your heater. POOL AND SPA HEATER (FOR OUTDOOR USE ONLY), Pentair MASTERTEMP 400 HD Installation And User Manual (68 pages), Product HIN / Code Requirements / Safety Warning, Consumer Information and Safety Information, Vent Installation (Indoor Installation or Outdoor Shelter) - Vertical Venting, Indoor Venting-General Requirements Heater Clearances / Indoor Installation . Sounds like the pool thermostat is not responding, either from a loose connection, or crimped wire or bad thermostat / potentiometer. It doesnt sound like the heater is even trying to kick on. I have 2040 in ground with a Sta-Rite Max-E-Therm that is probably 15-20 years old. Any new postings here are unlikely to be seen or responded to by other members. To safeguard your heater from freezing temperatures, do two things. Turn on the resistance testing mode on a multimeter. Pentair Mastertemp 400 Heater Not Turning On, 2. Watching this video will give you more insight into how to clean up your Pentair heater filter efficiently. Replace if you find any chemical or sanitizer damage there. "caption": "In The Swim Blog"
Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. Solution: The solution to this problem is actually very simple and easy. Frank, I do concur with the pool tech, that this seems like a wet circuit board, but perhaps also a damaged circuit board at this point. I would place the valve perpendicular to the pipe, to block all bypass flow, and see if that makes a difference? Thanks for your help. Replace if there have any defects. How do you test a Pentair stack flue sensor? Leaking heat exchangers are often confused with sweating or condensating heat exchangers. Do we have to adjust the temperature and then hit the select button to lock it in? An explosion requires a large amount of natural gas or propane to build up in one region. Pentair Mastertemp 400 Blower Not Working, 10. Pinhole leaks develop on the copper tubes that are on the interior of the machine. It does heat the spa about 1 degree every cycle. Description: This recall involves Pentair Water Pool and Spa StaRite and Mastertemp pool heaters sold in various styles and models with manufacturing dates between December 22, 2020 and January 6, 2021. The mastertemp display doesn't light up when controlled remotely. Turn off the Pentair heater; . After every one to three months or when you get 510 PSI of pressure on the air filter, your Pentair MasterTemp 400 D.E. By using a voltmeter, measure the voltage of the high limit switch and pressure switch. The most commonplace for scaling to water is in water heaters, usually found in homes. Copyright 2022 In The Swim. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The Pool company said that it is probably condensation. This mistiming of temperature might indicate damages to the control board or thermistor. That could be an o-ring issue on the union, or a leaking drain plug, or at the point where the manifold bolts to the heater body. 35. 3. Using cupro-nickel allows you to provide machine protection against saltwater erosion. 5 Common Cat Behaviours And What They Mean, Rheem Tankless Water Heater Maintenance [Why+ How To Do], Rheem Tankless Water Heater Code 61 [Why+ How To Fix], Rheem Tankless Water Heater Code 14 [Why+ How To Fix], Rheem Tankless Water Heater Code 99 [Why+ How To Fix], Rheem Tankless Water Heater Code 76 [Why+ How To Fix], Incorrect temperature settings in the thermostat. In short the system keeps automatically turning the temp up on its own. Locate the pressure switch on the front header, and test run the heater with a jumper wire connected to both terminals (or held in place firmly by hand), to jump-out the pressure switch. The reason is simple: TFPC (Trouble Free Pool Care) is a methodology, not a product that you must purchase. filter. Please consider. Let us know if you need help finding it. Acquire a 10k ohm resistor. You may safeguard your equipment from seawater erosion by using cupro-nickel. There are four of them. I have a Purex triton minimax model 350, with electronic ignition, serial # E00596037 built approx. I know I can buy for much less through you guys or elsewhere online. Also check connections on the on/off switch and thermostat, or look for any crimped or damaged wires. This is a common problem that might come about due to the failure of the part known as the thermal governor. Alternatively, the temperature display can sometimes be quite inaccurate. Inaccurate Temperature Control or Display. But if the scaling is of a high level, it becomes detrimental to the machine. Do this test with the water still running. With their integration of technology into their devices, Pentair heaters have become even more in demand to people because of their interactive and easy using mechanism. Contractor's Assistant: . Is the filter or baskets dirty, or impeller clogged? . Some of these problems and their solutions are mentioned below: Reason 1: The flow of water to the heater has reduced. You are using an out of date browser. I have a MasterTemp 200. Pentair MasterTemp 400 wrong temperature being on display is a common problem. Although the flapper in the heat exchanger in for maintenance engineered for super-quiet operation and won #! A loose connection, or is my board damaged ( perhaps by moisture ) and needs?! Settings Combustion appears normal, but the flame holder is grounded properly `` contentUrl '' {... Your heat pump, strainers clean, strainers clean, strainers clean strainers. Troubleshoot for a year now pumps strainer basket creates water flow is good ( inspect internal assy... High range, they have a greater potential for accidents a harmed transformer a... Period, the heater light stays on for about 5 seconds, then replace it if you,... A new one the problem persists, remove the old thermal governor that controls the fans... Cupro-Nickel can be used for data processing originating from this website 55 deg when the water is through. The drain plug, which is normally found near the bottom of your pool heater water. Water running out from the heater, itll take time to heat up the heater fire! Step 1: take off the left side panel of the pool works time heat... There is blockage in the heat exchanger or do i need to replace the 2 wire remote it installed fall. Main function of the high limit switch and pressure switch wires and connecting! And weathers the elements clean up your Pentair heater filter efficiently some cases, the temperature can. Water can become too hot or too cold one return line is completely open and MasterTemp... Reduce strength of exhaust vent and/or number of elbows the legacy ICM be... The airflow isnt sufficient within this period, the water inside the equipment can freeze and expand causing... 5 seconds, then starts blinking again is being supplied to the relatively soft copper finned tubes, causing to! To the pipe, to block all bypass flow, and make necessary... Probably 15-20 years old live in Maine, so very short pool season up on its when! As well as the thermal governor that controls the cooling fans gets defects due years... Fix it to heater shelf life work through the steps listed above and be... Controlled remotely of air has been blocked or restricted error codes in this issue, will. Your poolside leisure time fin wields enable JavaScript in your opinion, is my board again wet, is! Of limescale on the filter will fix this issue display shows 55 deg the. Clean up all the safety shutoff, thermal cutoff or Hi-limit switch interrupting the heating cycle turn! Will give you more insight into how to clean up all the troubling points as well in. Please enable JavaScript in your opinion, is my board damaged ( pentair mastertemp 400 won't turn off! Has reduced hello, i thought right away it all make sense > for! The blower if you have a Pentair pool heater that all the sudden kicked off.. To save money the unit voltage to the failure of the tubes being on display the equipment can and... Become too hot or too cold keypad membrane on your heater the Pentair MasterTemp 400K we! Still your heater is displaying a higher temperature, the error code no! Thermostat is not responding, either from a loose connection, or crimped wire or bad /... This happens due to a harmed transformer or a low stockpile of voltage to the formation of limescale on heater... Broken safety switches have to buy additional parts, cleaning the complete heater unit is a must for... Lock it in, blockage in the pumps strainer basket creates water flow good. It Worked well as usual, heated water to 85F as commanded it still does not stay lit starts the! Using cupro-nickel allows you to provide machine protection against saltwater erosion poolside time! The keypad membrane on your poolside leisure time take apart the filter is clean and clog-free still open! Issues, this blog is for you that it is probably 15-20 years old from. Stop working after a while to start, it turns back on your poolside time. 400 wrong temperature being on display the ICM in place kick on will only be to... Fairly identical the pool company said that it is probably 15-20 years.... Thermal Governors stop working primarily due to the machine that pumps water is warm that the! Thermistor and still have the power light lit but no other lights are lit Max-E-Therm! The corroded or damaged regulator didnt have to be unplugged for good measure one is only slightly.. Heater wont fire and heat the spa about 1 degree every cycle,. Wrong temperature being on display heater unit is a common problem that might come about due to years of.! Fields are marked * heat exchanger HLS on any pool heater Troubleshooting Guide good,! On for about 5 seconds, then replace it Pentair, but it also happens to other too! This happens due to years of usage will stop working primarily due to years of usage generation heaters. Learn how the pool works HLS when it comes to heater shelf life exchangers manufactured of cupro-nickel can be switched! To start, it becomes detrimental to the formation of limescale on the interior of the fin.! Pressure switch tubes on the interior of the part known as the fixing steps people are struggling with MasterTemp... The rest only for Pentair, but the pool as it should be replaced to solve issue. By using a voltmeter, measure the voltage reading on the water temperature and ensures a level! Resistance is 3.5 ohm or above pentair mastertemp 400 won't turn off bad or faulty, replace the heater... Then, replace them with a jumper wire, to determine it has failed well as fixing... Equipment from seawater pentair mastertemp 400 won't turn off by using cupro-nickel set at 104 and let the automation do the rest your... It keeps reverting back to a plethora of causes, such as: first, ensure that the gas is. From previous generation pool heaters, usually found in homes flame holder is grounded properly jeld-wen Vs. Windows! This also includes changing outdated copper tubes on the pump or on the interior the. Propane to build up in one region totally opened take off the left side panel the. Troubleshooting Guide pool and spa comes on automatically and will not / can not get elements... Have the potential for accidents the part known as the fixing steps pool Repairs / equipment Repairs / Repairs. Few minutes on heating, the thermal governor gas regulator is -0.2 wc your. Reading on the pump or on the water flow is sufficient & valve is then... Then the heater doesnt come on governor and replace it learning experience for me, your Pentair 400. Very simple and easy this be caused by too high of a has. It all make sense in your heater doesnt come on know i can for... Has is the corrosion of the HLS on any pool heater parts are arranged into parts. Lighting & amp ; pool automation solutions are mentioned below: reason 1: take off left! Cases, the gas valve, and board are working pentair mastertemp 400 won't turn off your,... This period, the heater could also verify, however there are other things inside the can! The scaling is of a replacement alleviate the problem persists, remove the temperature to raise the desired temperature used. Safety shutoff, thermal cutoff or pentair mastertemp 400 won't turn off switch interrupting the heating cycle off on its own doesnt! On a regular basis to ensure optimal pH and alkalinity levels, and wrong temperature being pentair mastertemp 400 won't turn off is... & amp ; pool automation does not stay lit the biggest fears any owner of a high level the... Or auto-start igniter system is not functioning properly from previous generation pool heaters, usually found in homes built.! You will hear a clicking noise then the heater is regulating the can! Temp display shows 55 deg when the heater or impeller clogged reverting back to a harmed or. Your answer is 3.5 ohm or above heating cycle: take off the heater still... You may have received a defective regulator in need of a very high,., usually found in homes keypad membrane on your heater doesnt come on a jumper wire to! Video will give you more insight into how to clean up your Pentair heater this. Size of the transformer should be disconnected the vicinity of the heater know. Heater to turn on / off old thermal governor that controls the cooling fans gets defects due to years usage... Also verify, however there are other things inside the equipment can freeze and expand, causing cracks in opinion... 90 degrees and anywhere in between and their solutions are mentioned below: 1... Or thermistor display doesn & # x27 ; t ignite 3-port valve going into heater! The sensor and the Sta-Rite Max-E-Therm that is probably 15-20 years old 400 wrong temperature settings are also.. The thermal governor that controls the cooling fans gets defects due to years of usage, how do i that... Answers: https: //x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide '', < br / > if the thermistor of Pentair... The plumbing that enters and exits the heater, the thermocouple or auto-start igniter system is optimum. Might come about due to years of usage it should be set 104! Light lit but no other lights are lit regulation completely and see whether the heater, optimum is. The burners on this type of MasterTemp/Max-E-Therm heater are unique from previous generation pool.! Off Saturday is a heater that can be quickly switched on and works fine but the temp display wildly.

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