Hi Lance, those are good ideas, first lets think about flow rate. 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. 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. Clean up all the flue sensor orifices to ensure there is no grime on them. Ascertain that the blower is securely fastened in its location. Cant figure out why it keeps reverting back to a higher temp on its own when weve turned it down. Apart from the built in temperature controller, a built in water pressure switch combined with a stack flue sensor monitors the pump to prevent it overheating. Hi, I noticed in the video that there is an external bypass going in/out of the heater. Replace the defective one. I only own a pool. First, check the condition of the temperature sensor whether its good or not. Hi Davy I live in Maine, so very short pool season. Before turning on, the heater contains a pressure switch and an internal bypass to ensure the right amount of incoming water flow. Pentair Mastertemp 400 error code E01 means that the water temperature sensor is open. Sign In Upload. Smart connectivity via the Pentair Automation Systems enable you to manage pool . How does the thermistor work on the pool heater? As an Amazon Associate I Earn From Qualifying Purchases. A combination of these two leads to the formation of limescale on the interior of the tubes. Check through it. Maintenance goes a long way when it comes to heater shelf life. Also, check out the bypass valve and replace if it is stuck open. 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. Replace in case necessary. Possible Cause: Pilot light isn't lit. IF it stays running, first look for a cause of overheating, such as poor exhaust thru the heat exchanger or out the top, or debris on the burner tray, or low water flow, or it could be a faulty hi-limit switch (there are two hi-limits, a 135 and a 150. Turn on the resistance testing mode on a multimeter. The temperature should always be higher than the pool heater. Why is my Pentair pool heater not coming on? After persisting in this issue, you will hear a sound like a bumping sound from the heater. Replace if there have any defects. Low water flow is the cause of up to 70% of all My heater wont heat service calls. 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. When you say the exhaust pipe, I guess you mean the pipe carrying water out of the heater, or leaking on the front manifold? Submit a Support Request. Why Fiberglass Windows Are Not Popular And Are They Worth It? Doing this will drain the heater of any water, ensuring that no part of it has enough water to freeze and expand, causing harm. Easy troubleshooting and repair. We and our partners use cookies to Store and/or access information on a device. Replace the defective parts. Cleaning your heat pump on a regular basis will help you avoid this problem. To troubleshoot each of the above issues, the user needs a quick working solution guide. If the problem persists, remove the temperature regulation completely and see whether the heater runs. ET Monday through Friday, or online at www.pentair.com and click on Products, then Pool . http://www.haywardnet.com/pdfs/uhs-heater-troubleshooting-guide.pdf Page 37. Is it possible to replace the heat exchanger or do I need to replace the entire heater system altogether. Pentair water heaters have garnered a dependable reputation for being efficient. 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). But the corrosion mainly occurs from the leakingof the interior parts of the heater, low water flow, open bypass valve, stuck closed of the thermal regulator, dirty filter, and imbalanced PH level on the pool water. Its possible that you have a defective control unit or thermal sensor unit if the burners start up and then shut down. Pentair Mastertemp 400 comes on automatically and will not / cannot be turned. service system & service heater lights are off heater set p read more "publisher": { Safety Controls. "@type": "ImageObject", The next day I powered pool-on and it registered the correct water temp. Also could possibly have circuit board problems. The water circulating through the copper heat exchanger tubes absorbs the heat, and exits the heater a few degrees warmer than when it entered. Pentair MasterTemp 400 Common Problems [15 Easy Fixes] March 26, 2022 by David. Top 3 pool pump problems, of course! Thanks for your help. Defective Keypad Membrane. Use this resistor to test the thermistor. There are two. FYInot a lot of options for competitive quotes, etcIn fact, they are so busy this summer, I couldnt even get anyone to look at it for 3 weeks and I just cant wait that long. Step 1: Take off the left side panel of the heater. There are some common temperature issues that users face. Remove the hard obstacle near the sensor. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Ignition failure is one of the common problems that the users of Pentair Mastertemp face. A sparking igniter is in good working condition. Section 5. someone has suggested: I removed detached the terminal from the termistor and got an E01 error code on the panel. Make sure to maintain the device properly. I called Pentair tech support and they helped with some troubleshooting. Make sure temperature setting is above water temperature. What can cause your Pentair MasterTemp 400 blower not working is a bad blower motor or a defective control board. 4. The Pentair Mastertemp 400 is a heater that is used to warm water in swimming pools, as well as in spas. The air space above the burner heats up, which heats the copper finned tubes laying on the top of the combustion box. Solution: Inspect the heater's gas valve, and check that it's set to the "OPEN" position. "height": "219", These problems could lead to build-up oflime scaleinside the copper tubes, which renders the heat exchanger useless and requires a replacement. I have a Purex triton minimax model 350, with electronic ignition, serial # E00596037 built approx. 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. It worked well as usual, heated water to 85F as commanded. When the amount of scaling is very low, it might often be beneficial. We will do our best to help. Like other pool equipment, pool heaters are prone to occasional malfunctions. 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. Save my name, email, and website in this browser for the next time I comment. Clean the water filter and pump basket to eliminate the water flow. The most commonplace for scaling to water is in water heaters, usually found in homes. We have a Pentair pool heater that all the sudden kicked off Saturday. Also check that the blower comes on. Check your igniter module. I think our heat exchanger corroded last summer. "@type": "Person", This also includes replacing any worn-out copper tubes on the machines interior. 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. Ryan, start with water flow, make sure that the filter and baskets are clean and the filter pressure is normal, and water is not bypassing the heater, externally, or internally from the internal bypass, located in the front header. If the machine that circulates is not turned on, Damage to the switch which controls the water pressure. Test your fill water too. Make sure enough water flow by cleaning the filter. It usually drips inside of the heater, making people think that their heat exchanger is leaking, when its not. Replace all the defective ones. Thermal Governors stop working primarily due to years of usage. "url": "https://intheswim.com/", Gas and air are mixed and ignited in the cylinder, which warms the tubes wrapped around the central burner chamber. He thought that with time, it dried out, thus returning to normal predictable function. If that is not, the incorrect voltage supply to the heater and blower, shorted pressure switch, fusible link, and defective hi-limit switch lead to the blower failure of the heater. If the airflow isnt sufficient within this period, the heater will turn off on its own. Yes, there are some Pentair Mastertemp 400 common problems but its still a good one and highly recommended. Heat pump troubleshooting guide for Pentair pool heaters. The MasterTemp has a max setting of 104. $4100 is not cheap. It will be tough for the heater to function correctly with lower water levels. Sir, I have a natural gas Pentair 400 Master Temp new about 5 years ago. It does heat the spa about 1 degree every cycle. This mistiming of temperature might indicate damages to the control board or thermistor. See page 16 and verify the gas regulator is -0.2 wc. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. "height": "219", 3. If your pool heater blower is not working, be sure the blower is blocked by debris. My Pentair 250 heater will not stay on the pool setting. Check the wire going to the sensor and the sensor itself. It fires up fine again then the same thing happens. Dont ignore the strainer basket near the pump. Curt could be a short in the thermostat wire, or the thermostat could be going back, check the wire connections for rust/corrosion. Check out the internal and external bypass systems. Replace the fuse if blown. Let us know if you need help finding it. 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. 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. Help finding it see page 16 and verify the gas regulator is wc! 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