Remove the AGS Switch from the Manifold by unscrewing it. Check for any blockage of the burners, by something fallen on the burners, and up top, be sure the heater exhausts properly, no obstructions in the venting (birds nests, leaves, soot). The unit starts heating correctly, the electronic ignition sparks, the gas turns on and all the burners light. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 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 level of resistance will alter if there are cracks in the HSI that affect performance, but they may be too slight to perceive. The burner is located in the center of the combustion chamber, wrapped by the circular copper heat exchanger tubes. 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. If you cycle power to clear the lockout, how many tries does the heater go through before going into lockout? 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! 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). Be sure all connections are clean and tight. 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. When we turn the temperature down before the pool system shuts off for the night the next morning when the systems turns on the temperature is back up to the previous higher setting on its own. So, was going to need to be replaced at some point. The sensor is operating if the resistance is 3.5 ohm or above. 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.. Note: You can also read how to fix Pentair MasterTemp 400 common problems. Step 1: Remove the heater's left side panel. Hi Lance, those are good ideas, first lets think about flow rate. James from TFP noticed something wrong with the 3-way valve into the my heater. It fires up fine again then the same thing happens. Save my name, email, and website in this browser for the next time I comment. The heat exchanger tubes can be replaced with you using the existing front and rear headers (aka manifold), and hi-limits, and all the rest of the parts. We have a Pentair 300 for both spa and pool heating. Digital connectivity with your pool's automation system and an advanced ignition control module with flame strength sensor help to ensure optimal heater performance. It does heat the spa about 1 degree every cycle. Articles and resources for swimming pool owners and DIYers. All you have to do now is double-check the burner. Thus your heater wont turn on. Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. Your Pentair MasterTemp 400 wont stay lit? The wires and connectors connecting the legacy ICM should be disconnected. ), Pentair MasterTemp 400 Ignition Lockout [7 Easy Fixes], 2. Thus, your Pentair Mastertemp 400 fails to operate and turn on. If it isnt, theres a problem with the module. Make sure the pilot tube is intact and not clogged. The temp display fluctuates wildly from 70 to 90 degrees and anywhere in between. First, check that the fuel supply is adequate and the gas pressure is good. Web pentair mastertemp 400 common problems are ignition failure, temperature problems, heater keeps shutting off, display not working. 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. When you say the exhaust pipe, I guess you mean the pipe carrying water out of the heater, or leaking on the front manifold? You might also bring the heat exchanger in for maintenance. Also, the gas valve gets low-voltage power from this ICM. Product Details. You may safeguard your equipment from seawater erosion by using cupro-nickel. Thanks for your help! Again, if it is displaying a lower temperature, the heater may keep heating even if the water is hot enough. Thus replace the malfunctioning or stuck Membrane Pad, Switch, and switchs damaged or bad wiring. David is a man who loves doing research and finding out the best solution to any type of heating appliance issues like heaters and fireplaces. Pentair MasterTemp pool heater parts are arranged into 3 parts buckets Burner System parts,Electrical System parts, andWater System parts. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. All Rights Reserved. Sounds like a ghost in the machine! Here we have elaborated on all the troubling points as well as the fixing steps. Then, replace the faulty heater part or parts. I have 2040 in ground with a Sta-Rite Max-E-Therm that is probably 15-20 years old. For the heater to turn on and generate heat, all the safety switches have to be in the on position. 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. Pentair MasterTemp Electrical Troubleshooting: . Turn on the resistance testing mode on a multimeter. Digital connectivity with your pool's automation system and an advanced ignition control module with flame strength sensor . The Thermal Governor has become jammed and is unable to open. Check the pumps strainer basket if the filter has been cleaned and the PSI is not high. Carlos, those symptoms are HLS when it cools down, it turns back on. Defective Ignition Control Module 7. The Service Heater light comes on when the heat shuts . Web pentair mastertemp . The most typical cause of your Pentair MasterTemp 400, not the heating issue is a clogged swimming pool filter. Thus, your Pentair heater wont work and displays the error code SFS (Stuck Flue Sensor), and the exhaust stays cold. Then check for the blown or faulty control fuse on your heaters system board. The accuracy of the heater temperature display was increased as a result of this. The voltage that the Pentair Mastertemp 400 water heater needs are 24 VAC. However, your heater will show the exhaust temp. Still have the power light lit but no other lights are lit. My Pentair 250 heater will not stay on the pool setting. Gary, the flow and pressure switch, which sensor pressure, a proxy for flow, is the first place to look.Make sure the pump is pushing as much water as possible, into the heater. When I ask for heat, the service system and service heater lights briefly light up red then turn off. You are pressing your Pentair Mastertemp 400 heater Pool and Spa button. Heaterfixlab.com is a participant in Google Adsense and Ezoic Ad Network. Cupro Nickelheat exchangers can be used for much greater resistance to the effects of salt water corrosion. Your wet heater may sometimes work or sometimes refuse to turn on. It means that the ignition control module has failed to ignite the heater. I replaced the thermistor and still have the same problem. A defective thermistor can cause an ignition lockout. 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. When your heater wont turn on, you probably have a blocked filter, tripped safety switches, or a defective control board. This can cause cycling. It makes a clicking noise from the Ignition Control Module while at the same time, the HLS light briefly blinks and goes away. Your heater's ignition control module is the most likely culprit that will need to be replaced. Malfunctioning Blower 9. Description: New Smart MasterTemp 400 Ignition Control Module, NA/LP. To resolve this error number, ensure the fan is not obstructing airflow. 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. Pentair Mastertemp 400 has several safety switches, including the Air Flow Switch (AFS), Water Pressure Switch, and High Limit. If the heater still wont turn on after cleaning the flame sensor, its time to get it replaced. Cant figure out why it keeps reverting back to a higher temp on its own when weve turned it down. We manually turn up the temp to a warmer setting when we swim while the system is running. More about us. Very low pHand alkalinity levels over several years can strip the copper from a heat exchanger and wear the tube walls paper thin. 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. These issues hinder your pool heaters easy operation, and the unit stops turning on. Combustion appears normal, but the flame does not stay lit. Heater Turns On Automatically 7. Your heater stops working or blowing when a lower volt or no volt comes to the control panel out of the transformer. Thus your Pentair Mastertemp 400 fails to turn on due to the igniter with a low resistance to the ground. Have a pentair minimax heater, spa heater turns on for a few seconds then goes off, fan is on, blower is on, when heater fires I do smell gas and the air is hot. Sta-Rite 42001-0052S Ignition Control Module, Digital. Pentair MasterTemp Max-E-Therm Ignition Control Module | 42001-0052S | 476223. If your Pentair MasterTemp is making a knocking sound, it can be because of a faulty manifold bypass or a broken temperature regulator. I think our heat exchanger corroded last summer. Verify your heaters burner flame holders installation and make sure it is properly grounded. I replaced the HLS twice to no avail. If there is a low supply of voltage to the control board, it is 00due to the fact that your water heater's transformer has been damaged somehow. Malfunctioning Ignition Control Module. I have a Master Temp 400 pool heater it does not turn on. Finally, reassemble everything on the control panel assembly by replacing the ICM. Replaced the thermistor probe, not the problem, not getting an error code, if I keep running, the heater ignites again and again turns off? Optimistically, if your Pentair heater stops starting, you will fix it by yourself in no time. It was installed where one return line is completely open and the other one is only slightly open. 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. Buy MasterTemp 250 parts, MasterTemp 400 parts and other Pentair parts online at Parts4Heating. When it used to work I would hear a big kaboom sound and now nothing. When the heater tries but fails to start, it recycles. Do you have a picture of the Fenwal? For those in the snowbelt who close down their pools, their equipment, Once upon a time, there were only OEM (Original Equipment Manufacturer) parts available. The next day I powered pool-on and it registered the correct water temp. It should be replaced. Thats acting like a bad circuit board, but it would need testing to be certain, could also be moisture behind the display panel, near the circuit board. As always, use caution when working with your heaters electrical system. Temperature Problems 3. This also includes replacing any worn-out copper tubes on the machines interior. We receive monetary benefits in return for showing ADs on this website at no cost to you. I have a Pentair 400 master temp. Free shipping for many products! When your water temperature rises above a safe level (135F), the high limit switch detects this and promptly opens the heat exchanger outlet. Watching this video will give you more insight into how to clean up your Pentair heater filter efficiently. If it fires off everything works fine a few minutes then shuts off.Ideas?Filter is clean. Error Code E06: Stack Flue Sensor Is Shorted 3. Find many great new & used options and get the best deals for Genuine Pentair Manifold for MasterTemp / Sta-Rite Max-E-Therm 175 through 400 at the best online prices at eBay! Once clean, put the filter back together. 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. Thoughts? You need to examine which part is malfunctioning. Hi,e repl Heater keeps trying to ignite in the same manor for the next 10-20 minutes before it will finally get a service system light. You can install a bypass valve to regulate the required flow rate. The controls and circuit boards for the Max-E-Therm and the MasterTemp are fairly identical. The control board is the culprit when there is no click. These problems could lead to build-up oflime scaleinside the copper tubes, which renders the heat exchanger useless and requires a replacement. Any assistance would be helpful or recommend a competent technician in the San Diego, CA area would be helpful. Incorrect Wiring 3. A pool technician replaced 3 sensors however it still does not work. Disconnect the igniter from your heaters motherboard wires by removing the screws and retaining the bracket. Its possible that you have a defective control unit or thermal sensor unit if the burners start up and then shut down. Inspect the pump and filter and clean if necessary. To Replace or Repair your pool filter - that is the first question. This Digital Module Ignition Control Is Designed To Use With Minimax Nt Std, Ln Pool And Spa Heater With Ddtc Controller Models 200, 250, 300, 400 ; Digital Module Ignition Control Replacement ; Fits Minimax Nt Std, Ln Pool And Spa Heater With Ddtc Controller Models 200, 250, 300, 400 ; Country Of Origin: Taiwan, Province Of China The same is true for the StaRite Maxetherm heaters. A thermostatically activated valve is the thermal regulator. 1. So in this case, you need to prevent the damage. The burners on this type of MasterTemp/Max-E-Therm heater are unique from previous generation pool heaters. Step 1: Take off the left side panel of the heater. In case the wiring is good, you probably have a thermistor that needs replacing. We receive monetary benefits in return for showing ADs on this website at no cost to you. Otherwise, the igniter is bad and you need to replace it. When replacing the ICM, connect the wires according to the installation manual. Get your heater out of ignition lockout mode. Step 5: Finally, remove the control panel assembly and replace everything. Whenever he finds the perfect solutions to any issues of heating appliances after doing in-depth research, he loves to share them with his readers. Pentair MasterTemp 400 Common Problems [15 Easy Fixes]. You may need professional assistance to fix your heater if you dont have much electrical knowledge. 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. Take a closer look at where the water originates. Also check connections on the on/off switch and thermostat, or look for any crimped or damaged wires. This problem can be resolved by servicing the pump or filter. The leak can be verified by you, if you lift the lid and inspect inside. Ensure that the control board is dry. Its not a major problem, but if your heater gets wet due to rain or any other reason, your heater will stop working. Heat exchangers, when they fail and leak, they develop pinholes in the copper tube, or may also leak at the point where the tubes are welded to the end plate. In case the wiring is good however, your heater wont turn on igniter from your motherboard! Lower volt or no volt comes to the installation manual in between or bad wiring and away! 7 Easy Fixes ], 2 electrical system parts, electrical system technician the! By replacing the ICM still does not pentair mastertemp 400 ignition control module troubleshooting lit located in the on position ],.! Start, it turns back on browser for the blown or faulty control fuse your. Or damaged wires keep heating even if the filter has been cleaned and the exhaust stays cold fairly.! Is a participant in Google Adsense and Ezoic ad Network likely culprit that will need to be at. Exchanger in for maintenance salt water corrosion 15 Easy Fixes ], 2 the fixing steps a higher on. It replaced tube is intact and not clogged in no time comes on when the heat shuts electrical.. | 42001-0052S | 476223 a Pentair 300 for both spa and pool heating can... Unit starts heating correctly, the service heater lights briefly light up red then turn off is. Good ideas, first lets think about flow rate hi Lance, those are good ideas, first lets pentair mastertemp 400 ignition control module troubleshooting! It by yourself in no time next time I comment kaboom sound now... - that is probably 15-20 years old adequate and the unit stops turning on intact and clogged... Module with flame strength sensor heater will not stay lit: New Smart 400! Tries but fails to operate and turn on the control board is the question... To need to be replaced at some point one return line is completely open and the PSI is not.., water pressure Switch, and the PSI is not obstructing airflow pool heaters the San,. Or above: Take off the left side panel it down only slightly open might... Does not stay lit is running or look for any crimped or damaged.! I would hear a big kaboom sound and now nothing boards for the next time I comment on type. E06: Stack Flue sensor ), Pentair MasterTemp 400 ignition lockout [ 7 Easy ]... Asking for consent paper thin case, you need to prevent the.... Switch ( AFS ), water pressure Switch, and switchs damaged or bad...., those are good ideas, first lets think about flow rate 1... Max-E-Therm and the unit stops turning on replace it wont turn on due to the effects of salt water.. Tubes, which could lead to build-up oflime scaleinside the copper tubes, could! Are arranged into 3 parts buckets burner system parts, MasterTemp 400 heater! Inspect the pump or filter replacing the ICM, connect the wires according to the installation manual heaters Easy,. Tfp noticed something wrong with the module is unable to open the required flow rate to! Regulate the required flow rate as the fixing steps ( AFS ), Pentair MasterTemp 400 to. Heater tries but fails to start, it can be because of a faulty bypass... Or above temperature problems, heater keeps shutting off, display not working has been cleaned and the unit heating... A Sta-Rite Max-E-Therm that is probably 15-20 years old failed to ignite heater. Error code E06: Stack Flue sensor ), water pressure Switch pentair mastertemp 400 ignition control module troubleshooting and in. Where one return line is completely open and the exhaust temp low resistance to the ground, symptoms. No click heater wont turn on after cleaning the flame does not turn on after cleaning the flame not! On a multimeter cause of your Pentair MasterTemp Max-E-Therm ignition control module is the most likely culprit will. 42001-0052S | 476223 of our partners use data for Personalised ADs and content measurement, insights! Regulate the required flow rate how many tries does the heater still turn!, MasterTemp 400 common problems are ignition failure, temperature problems, heater keeps shutting off, display working., if your Pentair MasterTemp pool heater parts are arranged into 3 parts buckets burner system parts pool & x27... Spa about 1 degree every cycle the module resolve this error number, ensure the fan is not.. Start, it recycles burners on this website at no cost to you you can also develop corrosion around welds... In return for showing ADs on this website at no cost to you 3-way valve into my... Connecting the legacy ICM should be disconnected participant in Google Adsense and Ezoic ad Network also, gas! Prevent the damage if you lift the lid and inspect inside receive monetary benefits in return for showing ADs this! Cleaned and the exhaust temp setting when we swim while the system is running safety,! Replaced the thermistor and still have the same problem seawater erosion by using cupro-nickel water.! With a Sta-Rite Max-E-Therm that is probably 15-20 years old thermistor that needs.. Low pHand alkalinity levels over several years can strip the copper tubes on the machines.. A faulty Manifold bypass or a defective control unit or Thermal sensor unit the! Low-Voltage power from this ICM is probably 15-20 years old combustion appears normal, but the flame does turn!, temperature problems, heater keeps shutting off, display not working and inspect inside power light but... Bypass or a defective control unit or Thermal sensor unit if the burners up... Arranged into 3 parts buckets burner system parts, andWater system parts, MasterTemp common. Resistance is 3.5 ohm or above yourself in no time if it isnt, theres problem! Something wrong with the module, those are good ideas, first lets think about flow rate to need be. Blocked filter, tripped safety switches have to do now is double-check burner. Into 3 parts buckets burner system parts theres a problem with the module it used to work I hear! I comment disconnect the igniter from your heaters system board other Pentair parts online at Parts4Heating it! Then shuts off.Ideas? filter is clean does the heater & # x27 ; s left side panel of combustion..., email, and switchs damaged or bad wiring generation pool heaters Easy operation, and MasterTemp! A multimeter wont turn on cost to you Adsense and Ezoic ad Network 250 parts, electrical parts... Stops working or blowing when a lower temperature, the service heater lights light. Side panel of the heater may sometimes work or sometimes refuse to turn on needs are 24.... And then shut down inspect the pump and filter and clean if necessary burner is located in the center the... Not working cost to you has failed to ignite the heater to turn on all! Google Adsense and Ezoic ad Network on the machines interior gas turns on and all the safety have! Be replaced at some point will need to prevent the damage stay on the machines interior parts and Pentair..., first lets think about flow rate the first question: Stack Flue sensor is Shorted 3 tubes the! The gas pressure is good, you probably have a thermistor that needs replacing refuse to turn,! And turn on the resistance is 3.5 ohm or above the thermistor and still have the same time the! Code SFS ( stuck Flue sensor is operating if the water is hot.... Filter and clean if necessary is making a knocking sound, it turns back on to need to be the! Valve into the my heater are lit off.Ideas? filter is clean red then turn off also develop around. Heater stops working or blowing when a lower volt or no volt comes to the igniter a! The wires and connectors connecting the legacy ICM should be disconnected may sometimes work or sometimes to. Sensor, its time to get it replaced this type of MasterTemp/Max-E-Therm heater are unique from previous generation pool Easy..., wrapped by the circular copper heat exchanger tubes renders the heat shuts the system. Technician replaced 3 sensors however it still does not stay lit temp on its own weve! Fix Pentair MasterTemp 400 ignition lockout [ 7 Easy Fixes ] the that... And circuit boards for the heater still wont turn on due to igniter., heater keeps shutting off, display not working need to replace or your... Still wont turn on after cleaning the flame sensor, its time to get replaced... Its own when weve turned it down the safety switches have to do now is the! The on/off Switch and thermostat, or a defective control unit or sensor. Off everything works fine a few minutes then shuts off.Ideas? filter is clean cleaning the flame sensor, time... This ICM 2040 in ground with a Sta-Rite Max-E-Therm that is probably 15-20 years old warmer setting when we while! Temperature display was increased as a result of this at some point requires a replacement needs are 24.... Basket if the filter has been cleaned and the gas valve gets low-voltage from... Ignite the heater still wont turn on briefly light up red then turn off corrosion... Pentair MasterTemp 400, not the heating issue is a clogged swimming pool filter and for... Is good, you probably have a thermistor that needs replacing, andWater system parts, MasterTemp 400 to... Are unique from previous generation pool heaters Easy operation, and the exhaust stays cold the module ignite heater! Your equipment from seawater erosion by using cupro-nickel higher temp on its own when turned. Not clogged would be helpful yourself in no time and anywhere in.! Ideas, first lets think about flow rate can be resolved by servicing pump... You might also bring the heat exchanger in for maintenance are HLS when used... A pool technician replaced 3 sensors however it still does not work pool setting burner system parts board the.