When exhaust temperatures are above 350 degrees, this occurs. 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. 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. Due to the sensor malfunction, your Pentair Mastertemp 400 heater can stop turning on. Test your control panel with a multimeter. But your heaters LCD screen displays nothing and the heater is not turning on mainly for the following reasons: Note: You can also read how to fix Pentair heater error codes problems. Size: 1- (Pack) 1- (Pack) 2- (Pack) 3- (Pack) 4- (Pack) 5- (Pack) We have a Pentair minimax 100 Dsi. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'fireplacehubs_com-mobile-leaderboard-1','ezslot_17',116,'0','0'])};__ez_fad_position('div-gpt-ad-fireplacehubs_com-mobile-leaderboard-1-0');Your Pentair Mastertemp Pool and Spa heater can refuse to turn on if its control panel gets no or insufficient power to run. We manually turn up the temp to a warmer setting when we swim while the system is running. Step 5: Finally, remove the control panel assembly and replace everything. 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. He said the heat exchanger is gone and it would be $2K to replace it all in or $4,100 all in for a new Max-E-Therm, 400 BTU LP, which they recommend. Otherwise, your control board is most likely to be blamed. First, test the terminal boards fuse to ensure your heaters continuity. When you say the exhaust pipe, I guess you mean the pipe carrying water out of the heater, or leaking on the front manifold? This is accessed thru the end cap, two bolts on the side of the header. However, your heater will show the exhaust temp. Im not sure where to even begin. The igniter can be found close to the top of the combustion chamber. You must also restore the Igniter Gasket when repairing the HSI. If the filter isnt the issue, a faulty safety switch is next to check. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. 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. Hold down your heaters SPA or Pool button to check your Mastertemp heaters exhaust temperature for at least 10 seconds. Curt could be a short in the thermostat wire, or the thermostat could be going back, check the wire connections for rust/corrosion. Other reasons why the heater is not turning on include: Faulty igniter The defective ignition control module Bad control fuse You will need to repair or replace damaged parts. We and our partners use cookies to Store and/or access information on a device. It could be caused by insufficient gas, damaged or wet igniter, defective ignition control module, or improperly grounded burner flame holder. The Ignition Control Module (ICM) receives line voltage to power your Pentair pool heaters igniter and blower. When I finally was able to control again (for a time, keypad controls seemed to be disabled), I shut heater off, let it sit for a time. To safeguard your heater from freezing temperatures, do two things. I look forward to your advice. The damaged or wet igniter cant ensure high resistance. Inadequate water supply to a filthy filter or a closed valve is why your Pentair MasterTemp 400 turns on and off. First, check that the fuel supply is adequate and the gas pressure is good. When you are trying to turn on your heater, the fuse can blow immediately. The wiring diagram is given below for your reference. I let it run and the temp slowly went up from 74 to 77 in just an hour without stopping. You may need to replace it. If the automatic gas shutoff switch has tripped, you need to reset it. Step 1: Remove the heater's left side panel. Step 4: Replace the HSI by reversing steps 1 through 4. Here we have elaborated on all the troubling points as well as the fixing steps. Bad Control Fuse 5. Also, maintain a cleaning routine and periodically clean your Filters dirt and debris build-up. The ignition module will not turn on unless the airflow switch and the other safety switches are closed. Pentair MasterTemp Electrical Troubleshooting: . Remove the old thermal governor and replace it with a new one. See page 16 and verify the gas regulator is -0.2 wc. We are always here to help you. Clogged Pool Filter 8. Follow the actions outlined below to replace it. The pool heater is about 4.5 years old. 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. Manage Settings Finally, reassemble everything on the control panel assembly by replacing the ICM. Step 2: Disconnect the system from the Max-E-Therm 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 sensor continuity or resistance should be between 3.5-4.0 megaohms. Free shipping for many products! http://www.haywardnet.com/pdfs/uhs-heater-troubleshooting-guide.pdf. Check for corrosion on the Pentair MasterTemp 400 flame sensor. 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. In case there is blockage in the heat exchanger, how do I fix that? The control board is in charge of almost all of the activities of your pool heater. The burner is located in the center of the combustion chamber, wrapped by the circular copper heat exchanger tubes. The blower needs to be repaired or replaced in this situation. Fill a jar halfway with 130F water. Do we have to adjust the temperature and then hit the select button to lock it in? Faulty thermal regulator or thermal regulator seats incorrectly, Incorrect fuel supply pressure and volume, Replace the corroded or faulty sensor, defective thermal regulator, the sensors bad connections, malfunctioning heat exchanger, coil. This error code should not be shown on your Pentair heater at this point. 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. But, is there a way that I can validate that there is really an issue? The Heat light blinks calling for heat and then it ignites Heat light goes steady for a few seconds and then stops and calls for heat again (Heat light blinks) and then ignites, Heat light steady and then stops again. The electrical system of Pentair MasterTemp pool heaters may seem intimidating, but the following charts will walk you through any mishaps. Cupro Nickelheat exchangers can be used for much greater resistance to the effects of salt water corrosion. If your Pentair Mastertemp 400 won't turn on, for sure, the heater is facing a power supply degradation problem from the . Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. Then, replace the faulty heater part or parts. when temp is down it kicks on as soon as it goes over setpoint it shuts off. Then checks the continuity across the sensor. Get a new igniter, the same as the previous igniters part number. This item Pentair 460783 Ignition Control Module Replacement Kit MiniMax NT Pool and Spa Heater Pentair 472447 Digital Module Ignition Control Replacement MiniMax Pool and Spa Heater Swimables 42001-0063S High Limit Switch for All Pentair Mastertemp and Starite Pool Heater - Compatible with All Sta Rite and Pentair Pool Heater Parts Work through the steps listed above and youll be cannonballing into your warm pool in no time. The solution to your heater issue is given in your previous comment. Power is not going on the ignition module. I dont see my trouble addressed. Verify that the igniter is dry and not damaged physically. Flame Won't Stay Lit 8. Also, the other responsible factors are the wet heater, sensor problem, faulty membrane switch, tripping safety switches, and no power on the heaters control board. Noise 13. 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. 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. Hello. The keypad membrane on your heater should be replaced to solve this issue. It means that the ignition control module has failed to ignite the heater. The sealed heat exchanger surrounds the burner flame holder. Replace or Repair your Swimming Pool Filter? Then i see a R9 code. I have a Pentair Master Temp 300 Pool Heater that is 6 years old. The most crucial thing to remember is that the sensor is in good working order. Verify your heaters burner flame holders installation and make sure it is properly grounded. Inspect the pump and filter and clean if necessary. I replaced the thermistor and still have the same problem. The four bolts on the heating jackets must be removed. Ascertain that the blower is securely fastened in its location. Installing a pool heater is not simple, but is done DIY all the time. As soon as I read his reply about the 3-port valve going into the heater, I thought right away it all make sense. The device should be out of ignition lockout at that point. All Right Reserved by HeaterFixLab. This could be a sign of a faulty flame sensor. Heater is Pentair Mastertemp 200, installed May2017. Plus, itll be helpful for you to read our complete solution guide on Pentair MasterTemp 400 keeps shutting off. I installed a Ta60d sand filter three weeks ago and it worked fine with it until two days ago. Cant figure out why it keeps reverting back to a higher temp on its own when weve turned it down. You need to identify and solve the underlying cause of this issue before resetting the heater. Thus replace the malfunctioning or stuck Membrane Pad, Switch, and switchs damaged or bad wiring. Web pentair mastertemp 400 common problems are ignition failure, temperature problems, heater keeps shutting off, display not working. If not, replace it. So regularly clean your pool filter to avoid a clog. To resolve this error number, ensure the fan is not obstructing airflow. like it is having trouble exhausting, check for birds nest or heavy spiderwebs or leaves on the heat exchanger. Supercedes #42002-0052S. These issues hinder your pool heaters easy operation, and the unit stops turning on. Note: when the opened the manifold last winter to replace the bypass, the manifold and the heat coils have no signs of scales. Improperly Grounded Burner Flame Holder, Ignition Control Module Replacement Instructions, Pentair Mastertemp Pool Heater Filter Cleaning Instructions. Replace it if you want, or just continue to use the spa thermostat, for pool heating. The air space above the burner heats up, which heats the copper finned tubes laying on the top of the combustion box. Save my name, email, and website in this browser for the next time I comment. We activate both functions from a Jandy control inside the home Theres no code on the machine outside to indicate possible problems. Then I commanded a higher water temp, and heater came on as it should, reaching set points and shutting off burner as it should, then cycles on as water temp dictates. Thus your Pentair Mastertemp 400 fails to turn on due to the igniter with a low resistance to the ground. Gentlemen, Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. Is -0.2 wc while the system from the Max-E-Therm heater supply is adequate the. It could be going back, check that the fuel supply is adequate and the temp slowly up. 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