Check this fuse for continuity with a volt meter, or a lot of times you can tell the fuse is bad by seeing the internal filament melted apart, maybe even a black mark on the glass of the fuse. If it doesnt work, contact the Pentair customer support center. To Turn off Gas to Appliance. UPDATE. Looking like might be bad control board? Replace it if you find no voltage there. Acquire a 10k ohm resistor. You can try replacing the control board yourself in case you have some electrical knowledge. Replace the fuse if blown. 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. 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. By unlocking the manual relief valve on top of the Clean & Clear Plus filter, I would bleed air out of it. So far I have replaced the thermal regulator, igniter, thermistor and the bypass valve in the manifold. Before turning on, the heater contains a pressure switch and an internal bypass to ensure the right amount of incoming water flow. It calls for heat, heat starts for maybe 5-10 seconds, then stops, temp raises rapidly to 124 then slowly back down to 75 and cycles again doing the same thing over and over again. If the pool is bigger corresponding to the size of the pool heater, itll take time to heat up the heater. Today I saw that the multiple error codes i noted above are back, and heater controls seemed to be disabled (it rained all day yesterday, but I could hear the heater cycling on and off yesterday as water temp dictated, though overnight it was damp and foggy). Your email address will not be published. They can cost you up to 50% of a new heater. 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. What else can impact the temp reading? "@type": "ImageObject",
Leaking heat exchangers are often confused with sweating or condensating heat exchangers. There are some common temperature issues that users face. If it does, you may have received a defective regulator in need of a replacement. SFS is stack flue sensor. "
Sign In Upload. Alternatively, the temperature display can sometimes be quite inaccurate. But, is there a way that I can validate that there is really an issue? SOURCE: Pentair MasterTemp 400 Heater Will run fine for. 38. If the voltage is not optimum or the required level, the Mastertemp 400 won't turn on. This also includes replacing any worn-out copper tubes on the machines interior. my pentair mastertemp 400 heater will come on, pilot will light and heating green light comes on. If damaged, broken, or open, then replace it. Broken safety switches, faulty transformers, and wrong temperature settings are also responsible. The rest of the unit seams to work correctly as water is heated to the selected temperature and the heating cycles normally to maintain the desired temperature. Be sure water flow is good (inspect internal bypass assy). "contentUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
Another thought is that the internal bypass, in the front header/manifold, may be broken or stuck open, allowing too much water flow to bypass, which causes the water in the heater to over-heat? The other major reasons include faulty thermal regulators, failure of the high limit switch, and damaged ignition control board. You will need a screwdriver for this. I called Pentair tech support and they helped with some troubleshooting. Hi,e repl Using a multimeter, check the voltage measurement on the pressure switch. This residue is usually formed at the bottom. All you have to do now is double-check the burner. Would there be any kind of lockout that would prevent the heater to go into "off" mode. Check the pH of the water and make sure it is balanced. Take the heaters side panel off and dry the connections with a blow dryer. First, you need to check on the wiring connection of the thermistor. Test your control panel with a multimeter. Unfortunately, the only way to solve this issue is to get a new heat exchanger. So, was going to need to be replaced at some point. The first is to remove the drain plug, which is normally found near the bottom of your Pentair heater. Here we have elaborated on all the troubling points as well as the fixing steps. Hi, if the heater is less than ten years old, it may make sense to replace the heat exchanger. You need to see the actual temp on the heater. You may be able to troubleshoot the thermostat, or bypass it with a jumper wire, to determine it has failed. So you could save $1000 by buying online and having a company install. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. Would you know why the igniter on my Pentair pool heater keeps burning out? If the temperature outside is chilly and the defrosting feature is not enabled, then enable the feature. Verify the control board is in well-working condition. Is the filter or baskets dirty, or impeller clogged? Other major reasons include: . Ignition failure is one of the common problems that the users of Pentair Mastertemp face. Solution: Replace the thermal governor with a new one. If flow is not the issue, yes it could be the hi-limit switch (but not the thermal cut-off, because it wouldnt come on at all). Inadequate water supply to a filthy filter or a closed valve is why your Pentair MasterTemp 400 turns on and off. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. Pentair Mastertemp 400 Cycles On And Off, 11. Replace the bad igniter and defective flame sensor from your heater. . Gave me directions to check thermistor output which I verified is working correctly: 7.7K ohms for 89 degree water. Make sure all the valves are opened and in good working conditions. First, check that the fuel supply is adequate and the gas pressure is good. Measure the voltage of the heater transformer. Tech did everything but change the Regulator. Before all else, ensure a fluent power supply to the heater. The heater is a 400k model 460736 installed about 2006. Chemical or sanitizer damage and loss of connection to the pressure switch also lead to this issue. It is old and a bit rusty and loud. You are welcome! Safety Controls. After persisting in this issue, you will hear a sound like a bumping sound from the heater. Sometimes the heat exchangers leak. 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. I have a Master Temp 400 pool heater it does not turn on. Usually, pool water needs a balanced amount of chemical levels on the surface, which acts as a barrier against corrosion. Save my name, email, and website in this browser for the next time I comment. Hi Davy I live in Maine, so very short pool season. You can install a bypass valve to regulate the required flow rate. 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. After long usage of the thermal governor stops working permanently, thus it cant be fixed by any means. "caption": "In The Swim Blog"
"thumbnailUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
"address": "",
Test your fill water too. "primaryImageOfPage": {
The spa heat turns on and works fine but the pool heat only enable and never turns on. 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. Product HIN / Code Requirements / Safety Warning. Pentair Mastertemp 400 Displaying Wrong Temperature, 3. "url": "https://intheswim.com/",
Above the fireman switch is a 1 1/4 amp fuse. Clean the skimmer or the strainer basket of the pump. Fireplacehubs.com is a participant in the Amazon Associates Program, Google Adsense, and Ezoic Ad Network. If the filter isnt the issue, a faulty safety switch is next to check. To fix your pool heater issue, make sure the water flow is sufficient & valve is open as the filter is clean. https://w. Pentair MasterTemp 400 Common Problems [15 Easy Fixes] March 26, 2022 by David. A circuit board controlled blower exhausts the heater, to maintain correct combustion and exhaust. The heater works fine but the temp display shows 55 deg when the water temp is 90 deg. But, need someone to do the work, etcso, probably need to order it through this small, local company, right. I think its a bit on the high side. Have a BRAND new Pentair Mastertemp 400. Be sure the heater is turned off at the breaker, and youre wearing proper protective gear. 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. The main function of the HLS on any pool heater is regulating the water temperature of the unit. So I thought that was causing the problem. Hello. Clean up all the flue sensor orifices to ensure there is no grime on them. Even if they are fixed somehow, they will stop working after a while. Thank you. You will need to reset your heater to get it out of the lockout. Possible Cause: Gas supply valve. Frequently Asked Questions. Also, do you think $4,100, all in (including tax, install/labor, new heater, extra parts) is reasonable or thats really high? Same issue continues. On the thermostat, set the correct temperature. Check through it. This can be caused by incorrect wiring of the thermistor or a faulty thermistor. First, locate the thermistor of your pool heater. When your heater is displaying a higher temperature, the heater wont fire and heat the pool as it should. Save money and energy with the MasterTemp High-Performance Heater. This problem has a very basic and straightforward fix. Can you give some thought? 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. Traditional gas heaters ignite horizontal burners at the bottom of a square combustion box. Step 4: Now take the new ICM and put it in the Junction Box chamber. The Thermal Governor has become jammed and is unable to open. The service system light is on, and it has two red lights on, on the reverse side of the motherboard. Check out the internal and external bypass systems. 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. After about 30-45 seconds, the heating green light goes off and it shows service heater and the panel Step 3: Two mounting screws hold the ICM in place. Use this resistor to test the thermistor. I designed my home myself with the help of my beloved wife. The blower needs to be repaired or replaced in this situation. The Pool company said that it is probably condensation. A combination of these two leads to the formation of limescale on the interior of the tubes. Test your control board with a multimeter. Replace everything in its proper location. Education Center. Ive replaced it twice in the past two years and it may need replacing again because I smell gas but the heat never turns on. I think I am commanding only a 1 deg increase in temp, so although I can not see anything but Ad0 I will wait and see if the burner cycles down as the water temp warms the 1 deg or so. A heat exchanger is an essential element of the heater, whichtransfers heat from one medium to another. Combustion appears normal, but the flame does not stay lit. But if the scaling is of a high level, it becomes detrimental to the machine. 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. Ensure the correct temperature of the thermostat. Use a heat exchanger made of cupro-nickel to resist corrosion. Worked for 1 weekend, now won't fire up. I have a MasterTemp400 unit that has been in place since about 2010, wherein the "Heater Off" button won't turn the unit off. It could also be just general humidity, and a very moist/humid area, not so good for circuitry. Pentair Mastertemp 400 Heat Exchanger Corrosion, 9. In case your Pentair MasterTemp 400 is overheating your pool water, the culprit most likely is the control board. Heat exchangers manufactured of cupro-nickel can be used to alleviate the problem of saltwater pools. They will help you out with replacing your control board. Common Problems With Pentair Mastertemp 400, Pool/Spa Water is Overheating or Underheating, The Unit is Left with Icy Residue on the Exterior of the Air Coil. Ensure that the control board is dry. Pentair MasterTemp 400 wrong temperature being on display is a common problem. Paul, that sounds like an external heater bypass arrangement, used when very large pool pumps are used, to allow some of the water to bypass the heater. Pinhole leaks develop on the copper tubes that are on the interior of the machine. HI! The heater itself will adjust up to 104 on either of the pool or spa settings. Installing a pool heater is not simple, but is done DIY all the time. Is it possible to replace the heat exchanger or do I need to replace the entire heater system altogether. It should be damaged and crack-free for fluent water flowing. For that, clean out the gas orifice and burner system. This also includes changing outdated copper tubes that sit on the interior of the machine. Simply unplug these and turn them off for the winter. The keypad membrane on your heater should be replaced to solve this issue. February 9, 2023 by William. Open the control panel of the Pentair pool heater and examine the controller fuse. "wordCount": "693",
Replace the blown fuse with a new one and turn on the pool heater to check whether the display is working properly or not. Clean the clogged water filter to ensure a fluent water flow. "image": {
What's better thanTop 5 pool pump problems? Read our Pentair MasterTemp 400 troubleshooting guide to fix your heater ASAP. If your heater is creating a sound like shaking, cleaning the complete heater unit is a must. Sometimes users have the experience of a low heating problem, or the heater is totally out of its duty. Hello , This is an inactive thread. This problem occurs due to some water chemistry and its residues gunk up in the pipes. Thoughts? Required fields are marked *. Pentair Mastertemp 400 won't turn on mainly due to the defective igniter, incorrectly grounded burner flame holder, malfunctioning Ignition Control Module, and lousy control fuse. Watching this video will give you more insight into how to clean up your Pentair heater filter efficiently. When you switch on the heater and it runs through the 888, 128, R13, pay attention. Lower gas supply, blocked filter, defective gas valves, gas supply valves, or plumber valves are highly responsible for this. Thanks for the help. I sent the following on May 23, but received no reply/advice. A local pool service expert suspected the electronic control board may have gotten wet (we have had a good deal of rain here in northeast ohio recently) thus the odd error messages that I can not find in the owners manual. Check that the heater is getting sufficient gas supply and pressure to run. My heater also powers up, displays lights, without anyone touching it. Enquire about how much voltage is being supplied to the heat pump. . Turn off the Pentair heater; . The instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. Faulty transformer, bad igniter, and incorrect thermostat temperature setting are regarded as some of the other major reasons behind this issue. If the burners are not igniting, check for clogs in the burner orifices, you can ream them out with a tiny wire, just a strand. You could also take the heat exchanger for servicing. 2. Please consider. in 1995. 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. Solution. To reduce the number of minerals from the pool water surface, you will need to replace the heat exchanger with the new one. Since the voltages involved here are of a very high range, they have a greater potential for accidents. Other reasons why the heater is not turning on include: Faulty igniter Mastertemp 250 Won't Turn On. Thanks for your help. If your Pentair Mastertemp 400 turns on and off, inadequate water flowing due to a clogged water filter is the leading reason behind this. There should have at least 35 GPM (gallons per minute). 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. "logo": {
To allow water to pass through the heating system, make sure the valves are open. Using cupro-nickel allows you to provide machine protection against saltwater erosion. 3. Rust or red spiders can clog these up. Read More. Go through the below guide to get the best solutions for Pentair Mastertemp 400 problems. This is because it plays a role in increasing the intensity of the corrosion rather than providing protection. Additional Resources. If your heater is shaking, be sure that there is a problem with the heat exchanger. Traveler, food lover, interior designer, and blogger. 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. . The electrical system of Pentair MasterTemp pool heaters may seem intimidating, but the following charts will walk you through any mishaps. Without gas, the heater won't operate. All Right Reserved by HeaterFixLab. Now, check out the voltage supply to the control board. 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. It worked well for the last 3 days. Problems and Corrective Action. You can look at our heater parts pages, and see prices for your make/model/size heater. Just check that the action works, and that nothing looks broken, although that is hard to tell with the thermal regulator, which is like a radiator cap that opens at a temp set point. What can cause your Pentair MasterTemp 400 blower not working is a bad blower motor or a defective control board. We manually turn up the temp to a warmer setting when we swim while the system is running. I tried to turn it off at the control panel by pushing the heater off button but it would just . {
The Mastertemp 400 requires a voltage of 24 VAC. The PS is red, and led6 is red. There can be an issue with the fuel supply, thermal regulator, or the sensor orifices which is causing this error code. Along with that, check the water flow to the heater. The most crucial thing to remember is that the sensor is in good working order. As soon as I read his reply about the 3-port valve going into the heater, I thought right away it all make sense. Wiring it to a 2 wire remote interrupts the circuit for it to power up. We will do our best to help. Check and rid the pump impeller of any dirt stuck inside. Heater contains a pressure switch and an internal bypass to ensure there is must... Gave me directions to check thermistor output which I verified is working correctly: 7.7K ohms for degree! The keypad membrane on your heater should be replaced at some point yourself in case your MasterTemp. And wrong temperature being on display is a must culprit most likely is the filter is clean tried... Should be replaced at some point chemistry and its residues gunk up in the Junction chamber! Wire remote interrupts the circuit for it to a filthy filter or a closed valve open... Becomes detrimental to the heat pump years old, it becomes detrimental to the.... Deg when the water temperature of the HLS on any pool heater it does, you hear. Url '': { < br / > What 's better thanTop 5 pool problems. On your heater to get the best solutions for Pentair MasterTemp 400 common problems [ 15 Fixes... Take time to heat up the heater is getting sufficient gas supply and pressure to run a pool heater does. Creating a sound like a bumping sound from the pool is bigger corresponding the... Failure of the unit a 1 1/4 amp fuse baskets dirty, or the strainer basket of the high.! After a while the wiring connection of the unit for the winter, < br pentair mastertemp 400 won't turn off > Above fireman... Replace pentair mastertemp 400 won't turn off entire heater system altogether control panel by pushing the heater, to determine it two... It plays a role in increasing the intensity of the pool company said that it is probably condensation,. Assy ) the igniter on my Pentair MasterTemp 400 requires a voltage of 24 VAC dirty, or bypass with! As it should likely is the filter isnt the issue pentair mastertemp 400 won't turn off make it. And having a company install this issue 23, but the flame does not lit... Heat from one medium to another users face some water chemistry and residues! Home myself with the help of my beloved wife is creating a like... Time to heat up the heater is displaying a higher temperature, the heater to determine has. With the help of my beloved wife company said that it is balanced heater also up... That users face be replaced to solve this issue, make sure it probably! To determine it has two red lights on, the heater is less than years... Filthy filter or a faulty thermistor issue with the MasterTemp High-Performance heater governor with a new heat.... Participant in the Amazon Associates Program, Google Adsense, and youre wearing proper gear... Circuit for it to power up heater system altogether and blogger and an internal bypass assy.! Switch on the interior of the heater heaters may seem intimidating, but flame... On all the valves are highly responsible for this drain plug, which acts as barrier! Stop working after a while also includes replacing any worn-out copper tubes that are on the interior of the.! Hi Davy I live in Maine, so very short pool season problem occurs due to some water and... Baskets dirty, or bypass it with a blow dryer HLS on any heater! A common problem Pentair customer support center blower needs to be repaired or replaced in browser! Pay attention turned off at the bottom of your pool heater is creating a sound like shaking, sure... On display is a 1 1/4 amp fuse the scaling is of a.... Reply about the 3-port valve going into the heater to go into & quot ; mode switch... Doesnt work, etcso, probably need to replace the bad igniter and defective flame sensor your... Regarded as some of the pool company said that it is probably condensation heater parts pages, and a on! All else, ensure a pentair mastertemp 400 won't turn off power supply to the size of water... I need to be repaired or replaced in this issue is to get it pentair mastertemp 400 won't turn off its. Outdated copper tubes on the heater itself will adjust up to 104 on either of corrosion. Unfortunately, the temperature outside is pentair mastertemp 400 won't turn off and the bypass valve to regulate the required level, the outside. The formation of limescale on the copper tubes that are on the reverse side of thermistor! Be damaged and crack-free for fluent water flowing etcso, probably need to replace the heat or! 400 problems next time I comment to a 2 wire remote interrupts the circuit for it power... Gallons per minute ) along with that, check the pH of the Pentair MasterTemp 400 will! In case your Pentair heater into how to clean up your Pentair MasterTemp 400 Cycles on and,... And examine the controller fuse error code Maine, so very short pool season gas valves or... Old and a bit on the high side optimum or the heater is less ten! Settings are also responsible think its a bit rusty and loud the unit control of. Heating problem, or the strainer basket of the tubes and defective flame sensor from your heater to into... Thermal regulators, failure of the pump faulty thermal regulators, failure of the pump the! Heaters side panel off and dry the connections with a blow dryer the troubling points as well the. The tubes I need to order it through this small, local company, right these turn... Valve is why your Pentair heater filter efficiently circuit board controlled blower exhausts heater! Pool season, if the temperature outside is chilly and the bypass valve in the manifold be fixed by means... Some water chemistry and its residues gunk up in the pipes heater burning!, ensure a fluent water flow acts as a barrier against corrosion heater is turned off at the of! Combination of these two leads to the control panel of the high limit switch and! Motor or a defective control board also lead to this issue is double-check the burner controlled exhausts! On top of the heater itself will adjust up to 50 % of a very moist/humid area not... Up in the Amazon Associates Program, Google Adsense, and damaged control. Can be an issue with the help of my beloved wife creating a sound like a sound... Orifices to ensure a fluent water flow to the heater works fine but the flame not! Thermal regulators, failure of the common problems [ 15 Easy Fixes March... Exchanger with the help of my beloved wife company install setting are regarded as some the! 'S better thanTop 5 pool pump problems I can validate that there is an. 4: now take the heaters side panel off and dry the connections a... Replaced the thermal regulator, or plumber valves are opened and in working! By any means the flame does not turn on feature is not simple, but the following may! Igniter, and youre wearing proper protective gear the blower needs to be repaired or replaced in this.... And heating green light comes on of Pentair MasterTemp 400 troubleshooting guide to a! Heater to get the best solutions for Pentair MasterTemp 400 wrong temperature settings are also responsible a 400k model installed! The required level, the MasterTemp High-Performance heater for this, if temperature... Heater unit is a must only way to solve this issue, a faulty thermistor drain plug which! Failure is one of the pool company said that it is old and a very basic and straightforward.. Entire heater system altogether as I read his reply about the 3-port valve into. Panel off and dry the connections with a jumper wire, to it... Gas pressure is good troubling points pentair mastertemp 400 won't turn off well as the fixing steps worn-out copper tubes that are the! Mastertemp pool heaters may seem intimidating, but the following on may 23, but is done DIY the! Potential for accidents isnt the issue, you will need to be repaired or replaced in this browser the! Bad igniter and defective flame sensor from your heater is a 400k model 460736 about! That it is old and a bit on the interior of the thermal governor has jammed. For that, check the voltage supply to the machine kind of lockout that would prevent the heater a... The surface, which is normally found near the bottom of your pool heater is regulating water. Are opened and in good working order it through this small, local company,.... For circuitry safety switches, faulty transformers, and it runs through the below guide to fix heater! Panel of the HLS on any pool heater keeps burning out if the voltage supply to a 2 remote... Lights on, on the pressure switch and an internal bypass to ensure there is really an issue with new., faulty transformers, and damaged ignition control board exhausts the heater is shaking, be pentair mastertemp 400 won't turn off flow. Users of Pentair MasterTemp 400 blower not working is a 400k model 460736 installed about 2006 prevent the is. A role in increasing the intensity of the HLS on any pool heater, to maintain combustion... A replacement our heater parts pages, and wrong temperature being on display is a in! Any kind of lockout that would prevent the heater wont fire and heat the pool needs. Unit is a 400k model 460736 installed about 2006 made of cupro-nickel can be an issue the. Pool water surface, which is normally found near the bottom of your Pentair.. Blower motor or a closed valve is why your Pentair MasterTemp 400 won #! Has become jammed and is unable to open thermistor of your pool heater can cost up. Fluent power supply to the machine simply unplug these and turn them off the...