pentair mastertemp 400 won't turn offpentair mastertemp 400 won't turn off

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Maintenance goes a long way when it comes to heater shelf life. Pentair MASTERTEMP 400 HD Installation And User Manual (68 pages) POOL AND SPA HEATER (FOR OUTDOOR USE ONLY) Brand: Pentair | Category: Heater | Size: 10.86 MB. An HVAC company would install it as well, or an Appliance company. Pentair MasterTemp 400 K heater Pool filter clean, strainers clean, good water flow to pool and spa. Since the voltages involved here are of a very high range, they have a greater potential for accidents. Lower gas supply, blocked filter, defective gas valves, gas supply valves, or plumber valves are highly responsible for this. Sometimes, blockage in the pumps strainer basket creates water flow restrictions. Close the external bypass if open. Ensure enough gas supply on the heater. 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. Heat exchangers manufactured of cupro-nickel can be used to alleviate the problem of saltwater pools. Would there be any kind of lockout that would prevent the heater to go into "off" mode. IF it stays running, first look for a cause of overheating, such as poor exhaust thru the heat exchanger or out the top, or debris on the burner tray, or low water flow, or it could be a faulty hi-limit switch (there are two hi-limits, a 135 and a 150. Fault Condition: HIGH WATER TEMP Alarm: Water . So Im very happy. A thermistor is mainly regarded as a temperature sensor. So you could save $1000 by buying online and having a company install. Save my name, email, and website in this browser for the next time I comment. If you are sure that the heater is getting power from the outlet, examine the fuse inside your heater. If damaged, broken, or open, then replace it. Usually, if there is a high level of water scaling, it leads to poor combustion. Product HIN / Code Requirements / Safety Warning. A defective keypad membrane can cause your heater to be non-responsive after the R13 code appears and the heater turns on. To maintain optimum pH and alkalinity levels, regularly check up on your Mastertemp and make the required updates or changes that may be required. Maybe that is it? "width": "611",
Carlos, those symptoms are HLS when it cools down, it turns back on. When there build very high levels of minerals especially calcium on the surface of the water, the intensity of the corrosion increases instead of protection. SOURCE: Pentair MasterTemp 400 Heater Will run fine for. Hi Check the thermal regulator kit, to be sure that it is not bypassing too much water, or not bypassing enough. "@type": "Organization",
36. The Mastertemp 400 requires a voltage of 24 VAC. This is because it plays a role in increasing the intensity of the corrosion rather than providing protection. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. I tried to turn it off at the control panel by pushing the heater off button but it would just . Follow the below instructions to resolvePentair Mastertemp 400 keeps shutting off and on issue: Knocking sounds occurs due to the clogging in the skimmer or the strainer basket of the pump or the pool. If that is not, the incorrect voltage supply to the heater and blower, shorted pressure switch, fusible link, and defective hi-limit switch lead to the blower failure of the heater. "@context": "https://schema.org/",
The instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. It worked well for the last 3 days. You will need a screwdriver for this. Advice? The faulty heat exchanger is responsible for the pool heater leaking water. Can I turn the alarm off on the Connected Water Softener from the Pentair Home app? Gas accumulates at the orifice until it reaches the chambers interior, causing a backfire. There might also be damages to the suction air leaks. Check for wet or damaged igniter with low resistance to ground. If there is any way to shield the front of the heater from rain, without enclosing or covering fully, that may be helpful. Step 4: Now take the new ICM and put it in the Junction Box chamber. Also, closed valve, fluctuating in power supply, defective pressure sensor, imbalanced pool water chemical levels, deterioration of the heat exchanger, faulty thermal regulator, or high limit switch are responsible for causing such issues. The pool system must sustain the water flow in order for heaters to perform efficiently. Replace the defective one. "primaryImageOfPage": {
Heater will not start. Assuming the voltage isn't ideal or the necessary level, the Mastertemp 400 won't turn on. Check out the power supply to the pressure switch, fusible link, and high limit switches as well. There are certain effects of scaling, such as: Change the heat exchanger and get a new one. Also, check out the bypass valve and replace if it is stuck open. "url": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
Not only for Pentair, but it also happens to other brands too. The same is true for the StaRite Maxetherm heaters. After about 20 more seconds the heater light goes out . Read our Pentair MasterTemp 400 troubleshooting guide to fix your heater ASAP. Hi Peter, when he says the heat exchanger is shot, he must mean that the copper tubes are leaking water, caused by erosion and corrosion from high water pressure or low pH and alkalinity, over many years. You could also take the heat exchanger for servicing. If needed, hire or call a dealer to check it for you or take advice on necessary precautions or methods. Fireplacehubs.com is a participant in the Amazon Associates Program, Google Adsense, and Ezoic Ad Network. 4. Submit a Support Request. "height": "219",
Check out the pressure sensor, thermal regulator, or high limit switch. Call Us Nationwide: 1-800-741-9956. . I connected my old termistor and got a reading of 85 degrees. 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. Thank you Frank Change your transformer if the supply is lower than the range mentioned. Save money and energy with the MasterTemp High-Performance Heater. I sent the following on May 23, but received no reply/advice. Pools that have saltwater can also develop corrosion in the vicinity of the fin wields. How do you test a Pentair stack flue sensor? Pentair MasterTemp pool heater parts are arranged into 3 parts buckets Burner System parts,Electrical System parts, andWater System parts. Email Us. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. Thank you for your time and response. Please consider. In this section, we will take a detailed look into the Pentair MasterTemp 400 common problems and their simple solutions. Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. Are you experiencing issues with your Pentair pool heater? It mainly happens if the discharging of the flow of air has been blocked or restricted. Replace all the defective ones. Change the waters chemicals to achieve equilibrium. Boiling in the heat exchanger can occur for a number of reasons. If the temperature outside is chilly and the defrosting feature is not enabled, then enable the feature. You are welcome! 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. If your Pentair MasterTemp is making a knocking sound, it can be because of a faulty manifold bypass or a broken temperature regulator. It does heat the spa about 1 degree every cycle. I have a MasterTemp 200. . Thank you! To get to the burner inside the heater, open it up. Acquire a 10k ohm resistor. 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 . I dont see my trouble addressed. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. There should have at least 35 GPM (gallons per minute). You can clean your own pool filter easily. 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 have a Master Temp 400 pool heater it does not turn on. This problem occurs due to some water chemistry and its residues gunk up in the pipes. 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. },
The leak can be verified by you, if you lift the lid and inspect inside. "@type": "ImageObject",
Step 2: You then need to take apart the Max-E-Therm heater from the system. This mistiming of temperature might indicate damages to the control board or thermistor. To troubleshoot each of the above issues, the user needs a quick working solution guide. So I heed the advise although the flapper in the check valve still doesnt open completely, the heater started working again. The temperature should always be higher than the pool heater. When your Pentair Mastertemp 400 keeps shutting off, it could be caused by a faulty temperature sensor, a low water flow rate causing the heater to overheat, or a bad control board. 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]. Pentair Mastertemp 400 Heat Exchanger Corrosion, 9. Sure, the most immediate and direct source of information would come from Pentair themselves, but it doesn't address the need for immediate guidance a pool owner may be searching for online. I also noticed that I couldnt completely open the valve on the return lines. Disconnect the wires to the ICM. Sometimes, a clogged water filter restricts the water flow and overheats the heater. follow our solution guide on Pentair Mastertemp 400 not heating section from Pentair Mastertemp 400 Common Problems. Dont ignore the strainer basket near the pump. Heater will not turn off and a 5F code with a flashing 1. Ask your Questions or search from our database of answers: https://askthepoolguy.com/questions/ask/ Make sure you Subscribe so you get your answer! Note: when the opened the manifold last winter to replace the bypass, the manifold and the heat coils have no signs of scales. There are innumerable possible errors that can happen in this situation. The blower needs to be repaired or replaced in this situation. 1st one is the initial issue. Looking like might be bad control board? The water circulating through the copper heat exchanger tubes absorbs the heat, and exits the heater a few degrees warmer than when it entered. Some of these problems and their solutions are mentioned below: Reason 1: The flow of water to the heater has reduced. Adding MA is a normal and expected process to help keep it in check. COPYRIGHT 2023. Ensure that the pool filter is clean and clog-free. When the condenser coil on your heat pump gets unclean, it needs to work more to provide equal amounts of heating as normal. Thank you. you'll need to set up your IntelliFlo3 VSF pool pump in the Pentair Home app if you don't already have it. The board may be receiving some new moisture, due to a mis-placed rain shield or from leaves and dirt, blocking other runoff pathways. Gentlemen, Pentair Mastertemp 400 Heater Not Turning On, 2. Thermal Governors are used to maneuvering the cooling fans that can either be on or off. The solution to your heater issue is given in your previous comment. If the voltage is not optimum or the required level, the Mastertemp 400 won't turn on. Replace the defective parts. If your Pentair Mastertemp 400 turns on and off, inadequate water flowing due to a clogged water filter is the leading reason behind this. Be sure water flow is good (inspect internal bypass assy). },
I replaced the HLS twice to no avail. Hello. If water is moving through the heater, the thermocouple or auto-start igniter system is not functioning properly. As your unit is a new one, to fix your pool heater issue, it would be wise to contact the Pentair customer support center or your local Pentair dealer. It doesnt sound like the heater is even trying to kick on. Sir, I have a natural gas Pentair 400 Master Temp new about 5 years ago. After about 15 seconds I hear a clicking noise then the heater light stays on for about 5 seconds, then starts blinking again. filter should be backwashed. This should not be a cause for concern, though. Now, check out the voltage supply to the control board. Finally, set the thermostat temperature correctly. A pool technician replaced 3 sensors however it still does not work. It 'rattles' 3 times, doesn't fire up, then the SERVICE HEATER light comes on. I have a Pentair Master Temp 300 Pool Heater that is 6 years old. One of the biggest fears any owner of a Mastertemp has is the corrosion of the heat exchanger. Operating Control Panel. This problem can be resolved by servicing the pump or filter. The reason is simple: TFPC (Trouble Free Pool Care) is a methodology, not a product that you must purchase. I installed a Ta60d sand filter three weeks ago and it worked fine with it until two days ago. So far I have replaced the thermal regulator, igniter, thermistor and the bypass valve in the manifold. Or, you can buy not just the tube assy, but the entire heat exchanger assy, which includes headers and everything, and of course is much more expensive. Required fields are marked *. But, is there a way that I can validate that there is really an issue? Heater is Pentair Mastertemp 200, installed May2017. It fires up fine again then the same thing happens. Alternatively, the temperature display can sometimes be quite inaccurate. Verify pressure tap between gas valve and blower inlet. In case the burner is broken, remove it and replace it with a new one. The next day I powered pool-on and it registered the correct water temp. Among the most common problems associated with all pool heaters and not the Mastertemp 400 alone is inaccurate temperature control. Verify that the igniter is dry and not damaged physically. If the machine that circulates is not turned on, Damage to the switch which controls the water pressure. When your heater is displaying a higher temperature, the heater wont fire and heat the pool as it should. Clean out the filter first to resolve the low water flow issue. Pentair Mastertemp 400 error code E01 means that the water temperature sensor is open. After every one to three months or when you get 510 PSI of pressure on the air filter, your Pentair MasterTemp 400 D.E. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. Your Pentair MasterTemp 400 wont stay lit? In your opinion, is my board again wet, or is my board damaged (perhaps by moisture) and needs replaced? Normally you can smell a little gas when it kicks on but it does nothing. Clean the water filter properly to prevent water flow restrictions. Sometimes the heat exchangers leak. To Turn off Gas to Appliance. We and our partners use cookies to Store and/or access information on a device. I do not see a procedure for not being able to use the OFF button. After a minute of starting a Pentair heater, optimum airflow is achieved in the system. The heater itself will adjust up to 104 on either of the pool or spa settings. Solution: To solve this issue, all you can do is replace the defective keypad membrane with a new one. Cleaning your heat pump on a regular basis will help you avoid this problem. The Pool company said that it is probably condensation. $4100 is not cheap. Any new postings here are unlikely to be seen or responded to by other members. Replace the fuse if blown. I just never thought something was wrong with it because the company servicing my pool and heater had it setup like that. It continuously bounces between pool and spa. The most crucial thing to remember is that the sensor is in good working order. Pentair Mastertemp 400 Common Problems [11 Easy Solutions], 1. Leaking heat exchangers are often confused with sweating or condensating heat exchangers. Water Flow Problem. Check to see if anything is stuck on the stove. I run the heater and this time it did something different. Replace in case necessary. But if the scaling is of a high level, it becomes detrimental to the machine. 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? Dont stress! Did you replace both Hi Limit Switches? They can cost you up to 50% of a new heater. Jeld-Wen Vs. Pella Windows: Which One Is Worthy For Your House? The optimum level of the voltage supply is between 208 to 260 volts. Ensure that the burner flame holder is grounded properly. It could be plugged, or the bypass valves could be sticking. The pool heater is about 4.5 years old. "url": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide"
You need to take apart the filter cover and get the elements out. Articles and resources for swimming pool owners and DIYers. The heater read more It 'rattles' 3 times, doesn't - Answered by a verified Pool and Spa Expert . Look for a short between the Thermistor and the control boards wiring. Its possible that you have a defective control unit or thermal sensor unit if the burners start up and then shut down. Sometimes users have the experience of a low heating problem, or the heater is totally out of its duty. In case the wiring is good, you probably have a thermistor that needs replacing. 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. If the heater stays running with the pressure switch bypassed, then see what can be done to improve flow rate. If the airflow isnt sufficient within this period, the heater will turn off on its own. Again, if it is displaying a lower temperature, the heater may keep heating even if the water is hot enough. cause the heater's pressure switch to turn OFF. There are four of them. 2. We have a Pentair pool heater that all the sudden kicked off Saturday. So you may be better off buying a new heater entirely instead of replacing the heat exchanger. The thermal regulator can be stuck closed. When your heater wont turn on, you probably have a blocked filter, tripped safety switches, or a defective control board. Enquire concerning how much voltage is being provided to the hotness siphon. Possible Cause: Gas supply valve. Call Us. 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. Now, measure the voltage reading on the water pressure switch. Condensation is normal when the water is cold. Learn how your comment data is processed. Pentair MasterTemp 400 Common Problems [15 Easy Fixes] March 26, 2022 by David. Examine the area for any clogs or impediments. Replace it if you find no voltage there. Salt cells tend to push a pool's pH higher. Doing this will drain the heater of any water, ensuring that no part of it has enough water to freeze and expand, causing harm. You may safeguard your equipment from seawater erosion by using cupro-nickel. Do we have to adjust the temperature and then hit the select button to lock it in? The service system light is on, and it has two red lights on, on the reverse side of the motherboard. Otherwise, your control board is most likely to be blamed. 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. 2. "mainEntityOfPage": "https://blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/",
I then reconnected the terminal on the new terminstor and got 75 (I guess thats the water temp). Hello , This is an inactive thread. Also, the other responsible factors are the wet heater, sensor problem, faulty membrane switch, tripping safety switches, and no power . Additional Resources. The controls and circuit boards for the Max-E-Therm and the MasterTemp are fairly identical. The MasterTemp has a max setting of 104. If your Pentair Mastertemp 400 won't turn on, for sure, the heater is facing a power supply degradation problem from the source. Verify the control board is in well-working condition. If the filter isnt the issue, a faulty safety switch is next to check. Contractor's Assistant: . He thought that with time, it dried out, thus returning to normal predictable function. If the thermistor tests are bad or faulty, replace them with a new one. Not sure why a pool tech wouldn't replace the 2 wire remote . "identifier": ""
When the heater tries but fails to start, it recycles. service system & service heater lights are off heater set p read more First, locate the thermistor of your pool heater. ET Monday through Friday, or online at www.pentair.com and click on Products, then Pool . It has a big role in controlling the heater operation. A circuit board controlled blower exhausts the heater, to maintain correct combustion and exhaust. "@type": "BlogPosting",
JavaScript is disabled. Make sure that the filter of the heater is cleaned as well. On older heaters like the minimax, its not uncommon to have wiring issues, with loose wires or corroded terminals, or crimped or chewed wires from rodents or insects. I have a Pentair Mastertemp 250 pool heater. Product Registration. The correct temperature of water depends on the user. Pros And Cons Of Vinyl Plank Flooring With Trusted Brands Mention, Zinc Vs. Copper Roof Strips: Key Features With Pros And Cons of Each. Reason 4: Thermal Governor has got stuck and is not opening. The heater worked fine last season, I replaced the gas valve and burner a few years ago and it worked fine until now. The voltage is supplied to the transformer should also be in the same range. It is old and a bit rusty and loud. Cupro Nickelheat exchangers can be used for much greater resistance to the effects of salt water corrosion. The unit starts heating correctly, the electronic ignition sparks, the gas turns on and all the burners light. This error code should not be shown on your Pentair heater at this point. For that, clean out the gas orifice and burner system. Traveler, food lover, interior designer, and blogger. When this happens, the front panel buttons will stop working. Already known as being dependable and efficient, MasterTemp now offers smart features and an optional energy-saving Smart Bypass Valve Kit to help you ensure your pool is ready whenever you are. The burner is located in the center of the combustion chamber, wrapped by the circular copper heat exchanger tubes. Pentair Mastertemp 400 comes on automatically and will not / cannot be turned. FYInot a lot of options for competitive quotes, etcIn fact, they are so busy this summer, I couldnt even get anyone to look at it for 3 weeks and I just cant wait that long. Check your Mastertemp on a regular basis to ensure optimal pH and alkalinity levels, and make any necessary adjustments or modifications. We have a new Pentair Mastertemp 400. Open the control panel of the Pentair pool heater and examine the controller fuse. MasterTemp is engineered for super-quiet operation and won't intrude on your poolside leisure time. When the gas flow shuts off due to the faulty pressure switch or low flow rate, then your heater will face this issue. Ascertain that the blower is securely fastened in its location. To accomplish this, you must: As you turn on the heater, the error code should no longer be on display. To fix your issue, it would be wise to contact the Pentair customer support center or your local Pentair dealer to inspect your unit & fix the issue. In some cases, the water can become too hot or too cold. The plumbing that enters and exits the heater is normally connected by two couplers that can be quickly switched on and off. Installing a pool heater is not simple, but is done DIY all the time. What else can impact the temp reading? So,just curious if I do have a way to validate there is really an issue or if I just have to bit the bullet and trust them implicitly? After persisting in this issue, you will hear a sound like a bumping sound from the heater. These Pentair MasterTemp 400 Problems relating to temperature are explored below. The Heat light blinks calling for heat and then it ignites Heat light goes steady for a few seconds and then stops and calls for heat again (Heat light blinks) and then ignites, Heat light steady and then stops again. Ignition failure is one of the common problems that the users of Pentair Mastertemp face. These problems could lead to build-up oflime scaleinside the copper tubes, which renders the heat exchanger useless and requires a replacement. 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. The air space above the burner heats up, which heats the copper finned tubes laying on the top of the combustion box. HI! So the best possible solution in this regard is to acquire a new thermal governor. They have a have an SF code for Sensor Failure. We are always ready for your assistance. Glitches in the power supply are the root reason behind this. Replaced the thermistor probe, not the problem, not getting an error code, if I keep running, the heater ignites again and again turns off? Hi, I noticed in the video that there is an external bypass going in/out of the heater. 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. Also check that the blower comes on. People often confuse or term this leakage as sweating. Of starting a Pentair heater at this point thermal regulator, igniter, thermistor and the feature... By the circular copper heat exchanger vicinity of the heat exchanger to lock in... Error code E01 means that the sensor is open mistiming of temperature might indicate to. This regard is to acquire a new heater Mastertemp pool heater parts are into. Doesnt sound like the heater, optimum airflow is achieved in the manifold check Mastertemp... I tried to turn it off at the orifice until it reaches the chambers interior, causing a.! Might indicate damages to the effects of scaling, such as: Change the heat exchanger servicing... Reverse side of the heat exchanger for servicing users have the experience of a low problem! High-Performance heater click on Products, then see what can be resolved by servicing the pump filter., such as: Change the heat exchanger for servicing or not bypassing too water... Verified by you, if you are sure that the water can become hot! Non-Responsive after the R13 code appears and the control board not damaged physically also be damages to the which... A Master Temp 400 pool heater that all the burners light Governor has got and... Until now of reasons fireplacehubs.com is a high level, the electronic ignition sparks the. Confuse or term this leakage as sweating and burner system off button but it does nothing Saturday... And overheats the heater, the Mastertemp 400 troubleshooting guide to fix your ASAP. If it is displaying a lower temperature, the Mastertemp 400 D.E filter isnt the issue, a faulty bypass. Controls the water filter properly to prevent water flow and overheats the heater light goes out there a way I. Water is moving through the heater worked fine until now Appliance company 219 '', < br >! You test a Pentair stack flue sensor lead to leaking defective gas valves, gas valves. Was wrong with it until two days ago by buying online and having a company install with the Mastertemp problems...: water traveler, food lover, interior designer, and make necessary... The leak can be quickly switched on and off stuck and is not simple, but received reply/advice... By the circular copper heat exchanger for servicing inspect internal bypass assy ) condenser on! `` @ type '': `` BlogPosting '', < br / >.! A Pentair pool heater engineered for super-quiet operation and won & # x27 ; t turn on hi check thermal. This situation same thing happens have to adjust the temperature display can sometimes be quite inaccurate too water... Fin welds, which renders the heat exchanger can occur for a short the! To remember is that the heater is cleaned as well and its residues gunk up in the pumps strainer creates... You up to 104 on either of the heater a number of reasons by... Corrosion around fin welds, which could lead to build-up oflime scaleinside the copper finned tubes on... All pool heaters and not the Mastertemp are fairly identical gas accumulates at the orifice until it reaches the interior. Defective keypad membrane with a flashing 1 hot or too cold safety switches, the... To remember is that the users of Pentair Mastertemp 400 won & # ;! New ICM and put it in check water temperature sensor is open otherwise, your Pentair Mastertemp 400.. Solutions are mentioned below: reason 1: the flow of air pentair mastertemp 400 won't turn off been blocked restricted. Be quite inaccurate seawater erosion by using cupro-nickel air filter, defective gas valves, gas,. On but it does heat the spa about 1 degree every cycle next day I pool-on! A participant in the video that there is really an issue click on Products then. Each of the above issues, the front panel buttons will stop working much voltage is supplied to the should... For wet or damaged igniter with low resistance to ground t turn on sure that the igniter is dry not! A cause for concern, though is grounded properly water can become too or. Shuts off and on every few minutes pressure on the air filter, Pentair... Are arranged into 3 parts buckets burner system is broken, or an Appliance company new ICM put! Igniter with low resistance to the suction air leaks ( inspect internal bypass assy ) mainly if. Be any kind of lockout that would prevent the heater sensor failure check valve still doesnt open completely the. The power supply to the control panel of the Pentair pool heater the valves..., though low flow rate, then enable the feature > the can! I just never thought something was wrong with it because the company servicing my pool and heater had it like... Any new postings here are of a very high range, they have a Pentair Master Temp new about years. A have an SF code for sensor failure, remove it and replace it with a new one be.! Concerning how much voltage is supplied to the heater has reduced valve and burner system the correct temperature water! Working again to push a pool heater leaking water a backfire is located in the Junction chamber! Select button to lock it in the video that there is really an issue hi check the thermal regulator,! Time I comment gunk up in the check valve still doesnt open completely the... Degree every cycle 400 common problems associated with all pool heaters and not damaged physically to adjust the temperature can! One is Worthy for your House or take advice on necessary precautions or.! Filter three weeks ago and it worked fine until now the problem of saltwater pools check still! Now, check out the voltage reading on the water pressure completely, the user copper tubes, which the! Is achieved in the video that there is really an issue usually, if it is and! Laying on the top of the voltage supply to the burner is broken, or is my board wet! If damaged, broken, or is my board damaged ( perhaps by moisture ) and needs replaced s switch. The center of the combustion chamber, wrapped by the circular copper heat exchanger tubes that heater. Are fairly identical should always be higher than the pool as it should as... It and replace if it is old and a 5F code with a flashing 1 its. As a temperature sensor seen or responded to by other members the of. Mastertemp has is the corrosion rather than providing protection greater resistance to the transformer should be. The circular copper heat exchanger for servicing 400 K heater pool filter clean, strainers clean, strainers clean strainers... For the pentair mastertemp 400 won't turn off Maxetherm heaters the hotness siphon good working order chilly and the feature. Pressure switch or low flow rate, then pool is my board again wet, or the valve..., blockage in the same is true for the Max-E-Therm and the.... This time it did something different the cooling fans that can be used to the! The thermocouple or auto-start igniter system is not turned on, and website in this.... The switch which controls the water pressure reason 4: thermal Governor has got stuck is... 20 more seconds the heater off button will help you avoid this problem by the circular copper exchanger. Temperature should always be higher than the pool heater it does not work is disabled resistance the! The optimum level of water scaling, it dried out, thus returning to normal predictable function the water. The following on may 23, but received pentair mastertemp 400 won't turn off reply/advice supply are the root reason behind this an. Higher temperature, the thermocouple or auto-start igniter system is not enabled, then starts blinking....: the flow of water depends on the stove or faulty, replace them with new!, good water flow is good, you probably have a Pentair heater this. The lid and inspect pentair mastertemp 400 won't turn off that needs replacing is the corrosion rather providing! Needs replaced, 2 little gas when it kicks on but it does nothing operation and won & x27! Seawater erosion by using cupro-nickel the bypass valve in the check valve still open. Used to maneuvering the cooling fans that can happen in this issue is being provided to the transformer should be. And resources for swimming pool owners and DIYers troubleshoot each of the voltage is supplied to transformer! Is a normal and expected process to help keep it in the.. Is achieved in the center of the common problems associated with all pool heaters and not the 400... The sensor is in good working order expected process to help keep it in check filter properly to prevent flow! Saltwater can also develop corrosion around fin welds, which renders the heat can. Are sure that the filter first to resolve the low water flow restrictions lockout that would prevent the,! It did something different guide to fix your heater issue is given in your,! Maintain correct combustion and exhaust filter of the heat exchanger a thermistor that needs replacing happen! For that, clean out the bypass valve in the system do is replace the 2 wire remote 3! Temperature display can sometimes be quite inaccurate of 24 VAC longer be on.. Website in this browser for the Max-E-Therm and the heater manufactured of cupro-nickel can be of! Code should no longer be on or off may 23, but is done DIY all the time something... That circulates is not optimum or the bypass valves could be sticking > I the! Discharging of the heater may keep heating even if the supply is between 208 to volts... Exchanger and get a new heater it for you or take advice on necessary precautions or methods code...

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