So, the voltage will only appear for about 20 seconds and it should drop out shortly after the gas valves opens. A faulty flame sensor, bad igniter, failed ignition control module, defective control board, or tripped or damaged air flow switch can all cause an ignition failure. Boiling in the heat exchanger can occur for a number of reasons. Step 3: Drain the heater by removing the Drain Plug from under the Manifold. You will need to reset your heater to get it out of the lockout. Unfortunately, the only way to solve this issue is to get a new heat exchanger. Continue with Recommended Cookies. The Pool company said that it is probably condensation. I think its a bit on the high side. It worked well as usual, heated water to 85F as commanded. #476223 Pentair MasterTemp 400 Pool Heater, Ignition Module. The error codes will help you understand what your Pentair heater is trying to tell you. Heres how to do it: The Pentair MasterTemp 400 error AFS appears on the display when the airflow switch is open. Hopefully, you now know what to do during a Pentair MasterTemp 400 ignition lockout. And thus your Pentair Mastertemp 400 stops turning on. Be sure the heater is turned off at the breaker, and youre wearing proper protective gear. Our Pentair MasterTemp troubleshooting guide starts with the error codes shared by both models. The thermal regulator should be in fine working condition. 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 voltage that the Pentair Mastertemp 400 water heater needs are 24 VAC. Comment and let us know whether you succeed in solving your heaters issue or not. Even if your Pentair Masteramp heaters terminal board gets power, the heater wont turn on, which means the faulty fuse is creating an issue. The wiring diagram is given below for your reference. We will do our best to help. But heat exchangers are expensive. This is accessed thru the end cap, two bolts on the side of the header. An HVAC company would install it as well, or an Appliance company. 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. Once clean, put the filter back together. The water circulating through the copper heat exchanger tubes absorbs the heat, and exits the heater a few degrees warmer than when it entered. Thank you! Also, do you think $4,100, all in (including tax, install/labor, new heater, extra parts) is reasonable or thats really high? If it does, you may have received a defective regulator in need of a replacement. Where is the thermal regulator on a Pentair Pool heater? But, need someone to do the work, etcso, probably need to order it through this small, local company, right. When the heater tries but fails to start, it recycles. This can be caused by incorrect wiring of the thermistor or a faulty thermistor. I replaced the thermistor and still have the same problem. Make sure that the pilot is lit (millivolt heaters). You might also bring the heat exchanger in for maintenance. 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. Beyond that, look thru this troubleshooting guide and consult your pool heater owners manual, as I cannot troubleshoot your heater from here. From the Max-E-Therm heater, disconnect the system. The other solutions to fix this issue are: To replace your Pentair pool heaters faulty igniter, do the following: An insecurely grounded burner flame holder is also responsible for preventing your Pentair Pool heater from turning on. Pentair Mastertemp 400 has several safety switches, including the Air Flow Switch (AFS), Water Pressure Switch, and High Limit. This could be a sign of a faulty flame sensor. To fix your pool heater issue, make sure the water flow is sufficient & valve is open as the filter is clean. The heater is only 3 yr old, just seems the erratic behavior is electrical/electronic in nature. The biggest fear about theheat exchangeris that corrosion can occur to the relatively soft copper finned tubes, causing them to develop pinhole leaks. These Pentair MasterTemp 400 Problems relating to temperature are explored below. Why does my Pentair heater keep turning off? Membrane switchs damaged or faulty wiring. Bad Control Fuse 5. When your heater wont turn on, you probably have a blocked filter, tripped safety switches, or a defective control board. Bad Control Board FAQs: When the system automatically turns on in the morning the heat temp setting not the pool temp is back up to the higher temperature setting on its own. Thus when your Pentair pool heater stops turning on, you should check and replace the bad igniter. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. And then connect the new igniter to your heaters motherboard wires. Be sure all connections are clean and tight. 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. Shorted Or Defective AGS 6. In short the system keeps automatically turning the temp up on its own. Pentair MasterTemp 400 wrong temperature being on display is a common problem. Pentair MasterTemp 400 heating light flashing is caused when the heater is calling for heat but not igniting. When I fire up the heater on Pool it begins to heat but after about 5-10 minutes it moves over to Spa Heat (which I dont have a spa) and shuts down the heater. Noise 13. 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. http://www.haywardnet.com/pdfs/uhs-heater-troubleshooting-guide.pdf. They can cost you up to 50% of a new heater. He thought that with time, it dried out, thus returning to normal predictable function. In this section, we will take a detailed look into the Pentair MasterTemp 400 common problems and their simple solutions. Look for any evidence of cracking on the flame sensor porcelain. Ensure appropriate gas flow and pressure in your heater, Clean your heater and ICMs dirt and black residue. Yes, there are some Pentair Mastertemp 400 common problems but it's still a good one and highly recommended. If its unclean, give it a good cleaning with a hose and check for fractures in the basket lid. Gentlemen, (Seconds! William is the founder of Fireplacehubs.com. An ignition failure can be the result of a failed flame sensor, bad igniter, malfunctioning ignition control module, faulty control board, tripped or broken automatic gas shutoff switch. Low water flow is the cause of up to 70% of all My heater wont heat service calls. 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. Pentair Mastertemp 400 ignition problem. The Thermal Regulator is located behind the threaded plug in the Inlet/Outlet Manifold, between the inlet and outlet fittings. In about 20 seconds, the gas valve opens and ignition should occur. If needed. 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. Fortunately, you simply need to remove and clean the filter and make sure all the valves are open. This would allow air to escape from the top of the filter, followed by a high-pressure water jet as the air is ejected. Troubleshooting the stacked exchanger type of heater is not much different than other electronic or digital pool heaters. This error code means that the stack flue sensor is open. It usually drips inside of the heater, making people think that their heat exchanger is leaking, when its not. However, your heaters filter becomes blocked for the following reasons: Over time, the slow accumulation of debris creates a clog in your heaters Filter. Replace it. You need to identify and solve the underlying cause of this issue before resetting the heater. If there is any way to shield the front of the heater from rain, without enclosing or covering fully, that may be helpful. In case there is blockage in the heat exchanger, how do I fix that? Is this normal? This problem has a very basic and straightforward fix. And also the exhaust temperature will remain below 250 degrees. In case the burner is broken, remove it and replace it with a new one. We have a Pentair pool heater that all the sudden kicked off Saturday. A flow issue or a poor thermal regulator can cause the water to linger in the exchanger and overheat. Verify your heaters burner flame holders installation and make sure it is properly grounded. Frank. We recommend you dont try to perform repairs that you dont feel confident attempting. The exhaust gas obstructions triggered the stack flue sensor in your heater. Step 1: Take off the left side panel of the heater. Sensor Issue 7. If the gadget is in good working order, it should close again. The following are some of these issues and their solutions: These are the possible solutions for this issue. So in this case, you need to prevent the damage. Defective Ignition Control Module 7. He loves to share his knowledge & helps others in fixing their units & saving their pockets. So, I opened the 3-port valve and adjusted it where the 2 return lines are fully open. Web these pentair mastertemp 400 problems relating to temperature are explored below. This problem can only be solved by replacing the ICM. It means that the ignition control module has failed to ignite the heater. The air space above the burner heats up, which heats the copper finned tubes laying on the top of the combustion box. Otherwise, your control board is most likely to be blamed. The instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. This problem can be resolved by servicing the pump or filter. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. The heater manifold, and also the water flow sensor, and the Thermistor connections may be getting wet. 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. It continuously bounces between pool and spa. Could the problem be with the flow or pressure sensors? So you may be better off buying a new heater entirely instead of replacing the heat exchanger. To test, unplug the ignitor and place your meters leads on it, setting the voltage to volts. Installing a pool heater is not simple, but is done DIY all the time. Step 3: Disconnect the heaters previous ICM unit. You need to examine which part is malfunctioning. Bought the house 2.5 years ago. The automatic gas shutoff or AGS switch is another safety feature of your Pentair heater. Thank you for your time and response. Copyright 2022 In The Swim. So you could save $1000 by buying online and having a company install. Pentair MasterTemp Electrical Troubleshooting: . Replace with new igniter. A second major problem with heat exchangers is scaling water conditions and poor combustion. Your heaters blower through the mixer draws the gas and air and forces these elements into the burner flame holder. 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. ), Pentair MasterTemp 400 Ignition Lockout [7 Easy Fixes], 2. 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. Also, at least once a year, you should disassemble and clean the D.E. Web pentair mastertemp 400,000 btu pool and spa natural gas heater from www.primepoolmarket.com. Following the Pentair Mastertemp 400 manual, connect the wires during your heaters ICM replacement. You can look at our heater parts pages, and see prices for your make/model/size heater. Pentair Mastertemp 400 error code E01 means that the water temperature sensor is open. Rust or red spiders can clog these up. Wet Heater 6. Hi,e repl Pentair MasterTemp 400 customer care can provide you with a replacement control board. Make sure the pilot tube is intact and not clogged. The sealed heat exchanger surrounds the burner flame holder. When the condenser coil on your heat pump gets unclean, it needs to work more to provide equal amounts of heating as normal. Save my name, email, and website in this browser for the next time I comment. when temp is down it kicks on as soon as it goes over setpoint it shuts off. The next day I powered pool-on and it registered the correct water temp. $354.18. in 1995. Quantity: $172.56. Pentair Heat Exchanger Troubleshooting: . If water is moving through the heater, the thermocouple or auto-start igniter system is not functioning properly. 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. Pentair water heaters have garnered a dependable reputation for being efficient. Accommodates: All MasterTemp 175/200/250/300400NA, MasterTemp 400LP, MasterTemp 400 ASME and MaterTemp 400 HD Model Heaters. Product Details. A defective AGS switch can cause ignition failure. To get rid of Pentair MasterTemp 400 code E05, first, check that the fuel supply is adequate and the gas pressure is good. Ensure that the pool filter is clean and clog-free. The Thermal Governor has become jammed and is unable to open. Pentair MasterTemp 400 error code E06 is displayed on your LED screen when the stack flue sensor has shorted. Do we have to adjust the temperature and then hit the select button to lock it in? $294.34. However, your heater will show the exhaust temp. Your heaters Membrane Pad has the pool/spa/off buttons and a keypad for inputting the spa and pool temperatures and displaying the digital temperature. Of course, there is also an internal bypass in most gas pool heaters. A sparking igniter is in good working condition. And again, I always thought that when something big happened, I would have to get it replaced. You may require cleaning your filter this way twice a year instead, depending on consumption (particularly if your pool is open all year). Check the pressure in your filter; this is a good indicator and approximation for flow rates. Dont stress! Troubleshooting your Pentair pool heater doesnt have to be a time-consuming hassle! Then, replace the faulty heater part or parts. The pool heater is about 4.5 years old. If the airflow isnt sufficient within this period, the heater will turn off on its own. The ignition module then powers the blower for pre-purge (timed) and after pre-purge powers the ignitor for a timed warmup period. 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). A leaking heat exchanger is a serious situation. 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? Digital connectivity with your pool's automation system and an advanced ignition control module with flame strength sensor . I just never thought something was wrong with it because the company servicing my pool and heater had it setup like that. Heaterfixlab.com is a participant in Google Adsense and Ezoic Ad Network. Any assistance would be helpful or recommend a competent technician in the San Diego, CA area would be helpful. Using a multimeter, check the voltage measurement on the pressure switch. $4100 is not cheap. Your heater valves also become closed due to the filters dirt or debris build-up. To volts any assistance would be helpful or recommend a competent technician in the heat is! 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