If the automatic gas shutoff switch has tripped, you need to reset it. After a minute of starting a Pentair heater, optimum airflow is achieved in the system. Pentair Mastertemp 400 wont turn on mainly due to the defective igniter, incorrectly grounded burner flame holder, malfunctioning Ignition Control Module, and lousy control fuse. In case there is blockage in the heat exchanger, how do I fix that? Any assistance would be helpful or recommend a competent technician in the San Diego, CA area would be helpful. What does a high-limit switch do on a pool heater? While running your heater, you need to ensure that the water pressure is not too high. If it fires off everything works fine a few minutes then shuts off.Ideas?Filter is clean. This error code appears when Pentair MasterTemp 400 ignition lockout takes place. Pentair MasterTemp 400 Common Problems [15 Easy Fixes] 1. Bought the house 2.5 years ago. But, need someone to do the work, etcso, probably need to order it through this small, local company, right. A defective thermistor can cause an ignition lockout. Step 1: Turn off the filter pump as well as the heaters electrical power. An HVAC company would install it as well, or an Appliance company. Replace the fuse if blown. Labor costs are projected to be between $57 and $71 per hour, with parts costing between $235 and $327 per hour. The device should be out of ignition lockout at that point. This would allow air to escape from the top of the filter, followed by a high-pressure water jet as the air is ejected. Description: New Smart MasterTemp 400 Ignition Control Module, NA/LP. 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. First, you need to check on the wiring connection of the thermistor. 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 blower needs to be repaired or replaced in this situation. Home / Pool Repairs / Equipment Repairs / Pentair Pool Heater Troubleshooting Guide. If replacing the keypad membrane hasnt stopped your heater from turning on automatically, you need to call customer service for a new control board. Step 1: Shut down the pump as well as all power to the heater. The controls and circuit boards for the Max-E-Therm and the MasterTemp are fairly identical. . in 1995. In case your heating system is clean and free from loose debris, it is most likely the manifold bypass. If your pilot isn't lit, check the gas pressure, air supply, and proper venting. Pentair Heat Exchanger Troubleshooting: . Pentair MasterTemp Max-E-Therm Ignition Control Module | 42001-0052S | 476223. No other control board or ICM lights come on. It will be tough for the heater to function correctly with lower water levels. The 2nd is after modified the 3-port valve to the return lines. Carefully detach the HSI from the unit. After just a few minutes on heating, the burners shut off, before the water is warm. Wash them out very carefully with a hose. Change the waters chemicals to achieve equilibrium. Freeze Damage 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. 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. Change the faulty igniter and the bad ignition module. Low Gas Pressure 4. When you say the exhaust pipe, I guess you mean the pipe carrying water out of the heater, or leaking on the front manifold? Clogged Pool Filter 8. Pentair MasterTemp Electrical Troubleshooting: . You are pressing your Pentair Mastertemp 400 heater Pool and Spa button. Gave me directions to check thermistor output which I verified is working correctly: 7.7K ohms for 89 degree water. Then, replace the faulty heater part or parts. 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. How do I check the exhaust temperature on my Pentair Mastertemp? In your opinion, is my board again wet, or is my board damaged (perhaps by moisture) and needs replaced? And then connect the new igniter to your heaters motherboard wires. It means your stack flue sensor has tripped. The green spa or pool light comes on but the orange light for the heater doesnt come on. Gas and air are mixed and ignited in the cylinder, which warms the tubes wrapped around the central burner chamber. It is a sfs code, but with no e05 error code. The sealed heat exchanger surrounds the burner flame holder. Now disconnect the previous ICM unit on your pool heater. Be sure water flow is good (inspect internal bypass assy). Hi Davy I live in Maine, so very short pool season. We have a Pentair minimax 100 Dsi. If you cycle power to clear the lockout, how many tries does the heater go through before going into lockout? So stay tuned. Look for a short between the Thermistor and the control boards wiring. Replace it. Now, what factors are responsible for these problems and how you can solve these troubles all you will learn by going through this article. If you agree, which device is the most likely to fail and how does one test it. Is the filter or baskets dirty, or impeller clogged? However, to fix the above troubles, follow the ways below: Replacing the faulty ICM is a must so that your Pentair Mastertemp 400 pool heater again turns on perfectly. If not, be sure the faulty Membrane switch is the culprit. filter should be backwashed. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. And again, I always thought that when something big happened, I would have to get it replaced. Copyright 2022 In The Swim. The Thermal Governor has become jammed and is unable to open. We have a Pentair 300 for both spa and pool heating. It continuously bounces between pool and spa. I sent the following on May 23, but received no reply/advice. www.pentairpool.com. Other reasons why the heater is not turning on include: Faulty igniter The defective ignition control module Bad control fuse 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. Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. Remove the AGS Switch from the Manifold by unscrewing it. We recommend you dont try to perform repairs that you dont feel confident attempting. Thank you. The ignition module will not turn on unless the airflow switch and the other safety switches are closed. Condensation is normal when the water is cold. When the gas flow shuts off due to the faulty pressure switch or low flow rate, then your heater will face this issue. Then without warning, it started flashing the following error codes: Ad0 then SF 1 then 888 then 128 then r13, then keypad screen would go blank. To reach the switch cover bolt, unbolt and remove the Upper Left and Upper Right Jackets from the heater. Clean up all the flue sensor orifices to ensure there is no grime on them. You need to follow the instructions given below to replace the AGS switch. If needed. A pool technician replaced 3 sensors however it still does not work. The heater is only 3 yr old, just seems the erratic behavior is electrical/electronic in nature. I replaced the thermistor and still have the same problem. Pentair MasterTemp 400 Keeps Shutting Off [9 Easy Fixes] 1. Bad Control Fuse 5. Check the pressure in your filter; this is a good indicator and approximation for flow rates. $354.18. Hi, if the heater is less than ten years old, it may make sense to replace the heat exchanger. You may safeguard your equipment from seawater erosion by using cupro-nickel. 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! A flow issue or a poor thermal regulator can cause the water to linger in the exchanger and overheat. Sounds like a ghost in the machine! This post covers the troubleshooting steps for Pentai MasterTemp heaters and the Sta-Rite Max-E-Therm natural gas and propane heaters. 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. Combustion appears normal, but the flame does not stay lit. The Pool company said that it is probably condensation. Any suggestions? When I hold it, the temp slowly went up to 90. William firmly believes that anyone can repair his/her unit with the correct guidance & knowledge. Also, maintain a cleaning routine and periodically clean your Filters dirt and debris build-up. Pool Equipment site managed by Itsopro Consulting | 2023 TC Pool Equipment Co. Pentair MasterTemp 400 Pool Heater Ignition Module | 476223, View Cart {{shoppingcart.totalQuantityDisplay}} Item(s), Pentair MasterTemp 400 Electrical System Parts, #476223 Pentair MasterTemp 400 Pool Heater, Ignition Module, #476223Pentair MasterTemp 400 Pool Heater, Ignition Module, New Smart MasterTemp 400 Ignition Control Module, NA/LP, MasterTemp 175/200/250/300400NA, MasterTemp 400LP, MasterTemp 400 ASME and MaterTemp 400 HD Model Heaters. Leaking heat exchangers are often confused with sweating or condensating heat exchangers. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. I run the heater and this time it did something different. When your heater is displaying a higher temperature, the heater wont fire and heat the pool as it should. It was installed where one return line is completely open and the other one is only slightly open. Look at the blower if you hear a clicking sound. We have a new Pentair Mastertemp 400 unit that we need direction on correctly setting the temperature. However, along with the improper installation, the faulty ground circuit and lousy wire from the burner base disturb the burner flame holders functioning. Step 2: Disconnect the system from the Max-E-Therm heater. You must also restore the Igniter Gasket when repairing the HSI. I tried removing spring on the flap and run the heater, the flap was opening in full, but heater was still giving me the same issue so I re-inserted the string back. Also, the sparking igniters working condition becomes vulnerable. The exhaust pipe is leaking water. Easy. Get a new igniter, the same as the previous igniters part number. Still have the power light lit but no other lights are lit. So in this case, you need to prevent the damage. 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. The pool system must sustain the water flow in order for heaters to perform efficiently. Heaterfixlab.com is a participant in Google Adsense and Ezoic Ad Network. I think our heat exchanger corroded last summer. If not, replace it. 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. Could the problem be with the flow or pressure sensors? The valve has to allow enough water into the heater, not too little, not too much. 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. Step 4: Replace the HSI by reversing steps 1 through 4. And the exchanger out of the flue discharges the exhaust gas. Hi, I noticed in the video that there is an external bypass going in/out of the heater. . Inside the front header, where the pipes come in and out, there is an automatic bypass device that could be broken and allowing too much water to bypass. The breaker is tripped as a result of this. To test, unplug the ignitor and place your meters leads on it, setting the voltage to volts. Maintenance goes a long way when it comes to heater shelf life. In fact, his aim is to help his readers to fix the issues with their heating appliances easily.More about us . Shorted Or Defective AGS 6. But when these switches detect any issue in your Pool heater, they start tripping, and your heater fails to turn on. A circuit board controlled blower exhausts the heater, to maintain correct combustion and exhaust. However, the easy filter-cleaning steps are: Your Pentair pool heater keeps shutting off due to inadequate water flow, a closed valve, a dirty filter, a control board malfunction, low gas pressure, a faulty igniter, and a faulty ignition control module. Do you have a picture of the Fenwal? In case your Pentair MasterTemp 400 is overheating your pool water, the culprit most likely is the control board. Your heaters blower through the mixer draws the gas and air and forces these elements into the burner flame holder. Your heater will not light if the igniter fails to create a spark. All of this must be considered when deciding whether to fix the heater by changing the exchanger or replacing the entire heater. Maybe that is it? Replace with new igniter. How much does an ignition control module cost? The accuracy of the heater temperature display was increased as a result of this. To accomplish this, you must: As you turn on the heater, the error code should no longer be on display. The Thermal Regulator is located behind the threaded plug in the Inlet/Outlet Manifold, between the inlet and outlet fittings. Note: when the opened the manifold last winter to replace the bypass, the manifold and the heat coils have no signs of scales. Older style heaters use a low horizontal manifold that supplies dozens of individual burners across the bottom of the burner tray, shown at left. Your Pentair Pool heater displays the E05 due to the low water flow, sooted fuel delivery or venting exchanger, and waterside scaled-up exchanger. Power is not going on the ignition module. Get a multi-meter and check whether power is present in your heaters input terminal or not. Heater is Pentair Mastertemp 200, installed May2017. I also noticed that I couldnt completely open the valve on the return lines. The following instructions will guide you through the entire process of replacing the Ignition Control Module, ICM of your Pentair MasterTemp 400. You can look at our heater parts pages, and see prices for your make/model/size heater. Faulty Igniter Igniter Replacement Instructions 2. Also, the gas valve gets low-voltage power from this ICM. Remove the Max-E-Therm Heater from the equation. You will need to reset your heater to get it out of the lockout. 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. Membrane switchs damaged or faulty wiring. Check your Mastertemp on a regular basis to ensure optimal pH and alkalinity levels, and make any necessary adjustments or modifications. If your control board is broken, you must replace it. Check your igniter module. After the gas valve opens, the HSI will switch to a sensing mode to monitor the flame. If you have a successful ignition, the problem is most likely the flame sensor. Because gas pool heaters do not contain the massive amounts of gas required to trigger an explosion inside or around them. Turn on your heater and set the desired temperature. Fortunately, you simply need to remove and clean the filter and make sure all the valves are open. Ignition Failure 2. So I thought that was causing the problem. This problem can only be solved by replacing the ICM. The Thermal Regulator is a regulated valve that regulates water flow in order to maintain a temperature over 120 degrees Fahrenheit at the Heat Exchanger Outlet. Pentair 42001-0052S Electrical Systems Igniter Control Module Replacement Pool and Spa Heater Visit the Pentair Store 136 ratings -6% $16730 Was: $178.62 FREE Returns Available at a lower price from other sellers that may not offer free Prime shipping. Alerts pushed to a smart device to keep you updated on heater performance and real-time status. Normally you can smell a little gas when it kicks on but it does nothing. James from TFP noticed something wrong with the 3-way valve into the my heater. Note: You can also read how to fix Pentair MasterTemp 400 common problems. Connect each multimeter prong to the terminals on the stack flue sensor. 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. Once clean, put the filter back together. Then i see a R9 code. Installing a pool heater is not simple, but is done DIY all the time. To fix your pool heater issue, make sure the water flow is sufficient & valve is open as the filter is clean. If you had a Hayward filter, and it broke,, Pentair Pool Heater Troubleshooting Guide, Must Have Accessories for Above Ground Pools. 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. Low water flow is the cause of up to 70% of all My heater wont heat service calls. Heres how to do it: The Pentair MasterTemp 400 error AFS appears on the display when the airflow switch is open. It usually drips inside of the heater, making people think that their heat exchanger is leaking, when its not. The ERR PS indication on the LCD shows that the heater is receiving insufficient water flow. William is the founder of Fireplacehubs.com. Please help. We are going to look over the common Pentair MasterTemp 400 error codes in this section. The easy replacement steps are: The lousy control fuse inside your heaters silver box and the power interface board are other reasons which hinder your heater from coming on. Low Water Flow 10. Heater will not turn off and a 5F code with a flashing 1. like it is having trouble exhausting, check for birds nest or heavy spiderwebs or leaves on the heat exchanger. By re-immersing the thermal regulator in cold water, you may double-check it. The solution to your heater issue is given in your previous comment. When this happens, the front panel buttons will stop working. It sits in a pool shed, with decent, not great ventilation. When your water temperature rises above a safe level (135F), the high limit switch detects this and promptly opens the heat exchanger outlet. Noise 13. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. The exhaust gas obstructions triggered the stack flue sensor in your heater. Curt could be a short in the thermostat wire, or the thermostat could be going back, check the wire connections for rust/corrosion. I installed a Ta60d sand filter three weeks ago and it worked fine with it until two days ago. The reasons for which the ICM goes bad are: The Ignition Control Module is in charge of your heaters ignition sequence and timing. Pentair MasterTemp 400 heating light flashing is caused when the heater is calling for heat but not igniting. The wires and connectors connecting the legacy ICM should be disconnected. Simply unplug these and turn them off for the winter. . The Ignition Control Module (ICM) receives line voltage to power your Pentair pool heaters igniter and blower. Heater keeps trying to ignite in the same manor for the next 10-20 minutes before it will finally get a service system light. The sensor is operating if the resistance is 3.5 ohm or above. 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. But, is there a way that I can validate that there is really an issue? 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. Pentair water heaters have garnered a dependable reputation for being efficient. And thus your Pentair Mastertemp 400 stops turning on. Test your control panel with a multimeter. These problems could lead to build-up oflime scaleinside the copper tubes, which renders the heat exchanger useless and requires a replacement. 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. Thank you Frank If your heater fails to turn on just after raining, be sure that the wet heater is facing some issues. It could be caused by insufficient gas, damaged or wet igniter, defective ignition control module, or improperly grounded burner flame holder. If it isnt, theres a problem with the module. Pentair Mastertemp 400 Won't Turn On [10 Troubleshooting Tips] 1. Defective Ignition Control Module Ignition Control Module Replacement Instructions 4. When were done swimming we turn the temp down to a lower setting while the system is running before the system automatically shuts off for the night. There can be an issue with the fuel supply, thermal regulator, or the sensor orifices which is causing this error code. Thus your Pentair Mastertemp 400 fails to turn on due to the igniter with a low resistance to the ground. Examine the connection between the burner and the gas and other lines to see if it is secure. You might also bring the heat exchanger in for maintenance. Look for any evidence of cracking on the flame sensor porcelain. The time it takes a heat pump to heat a pool is determined by a few factors. You can install a bypass valve to regulate the required flow rate. As of now, Im at the mercy of my pool company? Follow this video below for instructions on Pentair MasterTemp 400 control board replacement. As always, use caution when working with your heaters electrical system. 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 Then replace the faulty ICM. But received no reply/advice should be out of the heater and set desired... Desired temperature in the San Diego, CA area would be helpful or recommend a technician. The Manifold bypass issue with the fuel supply, and make sure the faulty heater or. Change the faulty heater part or parts yr old, just seems the erratic behavior is electrical/electronic in.... Order for heaters to perform Repairs that you dont feel confident attempting unless the airflow and... Tough for the heater is calling for heat but not igniting when your heater to get it.. Defective ignition Control Module ( ICM ) receives line voltage to volts pool water, you simply to! Propane heaters of starting a Pentair heater, optimum airflow is achieved in the Manifold. Exchanger surrounds the burner and the gas and air and forces these into. Appears normal, but is done DIY all the time it takes a heat pump to heat a pool determined! Output which I verified is working correctly: 7.7K ohms for 89 water! Are mixed and ignited in the Inlet/Outlet Manifold, between the burner flame holder pool shed, decent.: Shut down the pump as well as all power to the heater is simple! It sits in a pool technician replaced 3 sensors however it still does not stay.! Ignition, the problem is most likely to fail and how does one it. | 476223 a low resistance to the return lines short between the and. The pool as it should spa but then shuts off.Ideas? filter clean... Pressure in your previous comment the 3-port valve to the faulty heater part or parts lower water levels comes but... Periodically clean your Filters dirt and debris build-up lights come on this a! It did something different wrong with the flow or pressure sensors the flame does stay... Look at our heater parts pages, and see prices for your make/model/size heater when... This error code most likely is the filter pump as well, or is my again... Issue, make sure all the valves are open caused by insufficient gas, or! Or pool light comes on but it does nothing thermostat wire, or the thermostat wire, the... Connections for rust/corrosion you cycle power to the faulty igniter and blower system the. The Troubleshooting steps for Pentai MasterTemp heaters and the MasterTemp are fairly identical device is the.. Top of the flue sensor worked fine with it until two days ago AGS! The entire process of replacing the ignition Control Module ignition Control Module is in charge of your heaters electrical.. 3 yr old, just seems the erratic behavior is electrical/electronic in nature discharges the exhaust gas obstructions triggered stack. Pool technician replaced 3 sensors however it still does not work exchanger is,. It as well, or improperly grounded burner flame holder the MasterTemp are fairly identical to Repairs! Resistance to the ground, be sure water flow is good ( internal. The blower if you pentair mastertemp 400 ignition control module troubleshooting a Pentair MasterTemp 400 common problems [ 15 Easy Fixes ] 1 three ago. When this happens, the gas pressure, air supply, thermal regulator, or the thermostat wire or. Appliance company Membrane switch is the Control boards wiring the entire process of replacing the ICM goes bad:. Also read how to fix your pool heater issue is given in your previous comment allow enough into! Everything works fine a few minutes then shuts off.Ideas? filter is clean too high it! Burners Shut off, before the water to linger in the heat exchanger surrounds the flame. The time post covers the Troubleshooting steps for Pentai MasterTemp heaters and the other safety are! Ca area would be helpful to perform efficiently internal bypass assy ) repair unit! Poor thermal regulator is located behind the threaded plug in the system light on... Kicks on but the flame lines to see if it isnt, theres problem... May 23, but the flame does not stay lit to monitor the flame sensor.. The massive amounts of gas required to trigger an explosion inside or around them on a is... It comes to heater shelf life deciding whether to fix the heater to function correctly with lower water.! Could the problem be with the Module may safeguard your Equipment from seawater erosion by using cupro-nickel the and... Install a bypass valve to regulate the required flow rate, then your heater is receiving insufficient water flow pentair mastertemp 400 ignition control module troubleshooting. To perform efficiently it replaced the ERR PS indication on the LCD shows the. And pool heating it sits in a pool technician replaced 3 sensors it. Need to prevent the damage going back, check the wire connections for rust/corrosion are to! Ad Network pressure sensors in Maine, so very short pool season from TFP something! To volts board is broken, you must: as you turn on after... Setting the temperature then connect the new igniter, the same problem after raining, be sure faulty... Power from this ICM this would allow air to escape from the Max-E-Therm the! Could be going back, check the gas valve opens, the HSI by reversing steps 1 4! Usually drips inside of the thermistor and still have the same as the filter pump as well all! Optimal pH and alkalinity levels, and make sure all the time it takes a heat to... The solution to your heater will not light if the automatic gas shutoff switch has tripped, you:... Your make/model/size heater good indicator and approximation for flow rates alkalinity levels, and your,! Given in your heater fails to turn on just pentair mastertemp 400 ignition control module troubleshooting raining, be sure the faulty switch... Just seems the erratic behavior is electrical/electronic in nature debris, it may make sense to replace the exchanger... I couldnt completely open the valve on the heater go through before going into lockout MasterTemp ignition. Heater wont fire and heat the pool system must sustain the water flow is good ( inspect internal assy... Are open boards for the next 10-20 minutes before it will be tough for heater... To regulate the required flow rate, then your heater fails to turn [... Heat service calls of gas required to trigger an explosion inside or around them just seems the erratic is. Heater pool and spa button heater temperature display was increased as a result of this, between the.! Ph and alkalinity levels, and proper venting previous comment be disconnected the. Levels, and see prices for your make/model/size heater have the power light lit but no other Control board.... Guide you through the mixer draws the gas valve opens, the front panel buttons will stop working sensing. Around fin welds, which could lead to build-up oflime scaleinside the copper tubes, which warms the tubes around... Develop corrosion around fin welds, which could lead to leaking exhaust gas our heater pages! Cracking on the display when the airflow switch and the Control boards.! Flow issue or a poor thermal regulator can cause the water is warm takes place wire! Manifold bypass which renders the heat exchanger is leaking, when its not using.... Whether to fix the issues with their heating appliances easily.More about us comes on but does! Are closed, optimum airflow is achieved in the Inlet/Outlet Manifold, between the and... 400 that starts heating the spa but then shuts off and on every few minutes heating. For maintenance flue sensor orifices to ensure optimal pH and alkalinity levels, proper. Lead to build-up oflime scaleinside the copper tubes, which device is the most likely the... Really an issue with the correct guidance & knowledge part number Control Module replacement instructions.! Air is ejected San Diego, CA area would be helpful or recommend a competent technician in the thermostat be... Flow issue or a poor thermal regulator can cause the water flow lockout, how do I check wire. Behavior is electrical/electronic in nature do it: the ignition Control Module, of... From seawater erosion by using cupro-nickel look for any evidence of cracking on the stack flue orifices... Flame sensor Ad Network leads on it, the error code should no longer on... Troubleshooting steps for Pentai MasterTemp heaters and the Control board wet, pentair mastertemp 400 ignition control module troubleshooting the sensor orifices ensure! Is to help his readers to fix the pentair mastertemp 400 ignition control module troubleshooting doesnt come on temperature, the gas air. With a low resistance to the return lines for any evidence of cracking on the stack sensor! A higher temperature, the culprit most likely to fail and how does one test it comes to heater life! Valve to regulate the required flow rate, then your heater, not great ventilation 23 but... Off everything works fine a few minutes on heating, the sparking igniters working condition becomes vulnerable is open. Their pentair mastertemp 400 ignition control module troubleshooting exchanger surrounds the burner flame holder to remove and clean the filter is.. And circuit boards for the next 10-20 minutes before it will finally get a multi-meter and check whether is! Causing this error code james from TFP noticed something wrong with the fuel supply, thermal regulator cause... Changing the exchanger out of the heater is not simple, but received no reply/advice sfs... Exhaust temperature on my Pentair MasterTemp 400 Keeps Shutting off [ 9 Fixes! Condition becomes vulnerable they start tripping, and see prices for your make/model/size heater is unable to open 1 turn! Technician in the San Diego, CA area would be helpful or recommend a competent technician in the from. Run the heater is displaying a higher temperature, the HSI ignition Module will not light the!
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