Question about Hayward H Series Millivolt 250,000 Btu Pool Heater H2501

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Hayward pool heater pilot won't stay on

Put a new thermocouple in and it still goes out. has a good blue flame when button is depressed but et go of the button and the flame dies

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  • Anonymous Mar 22, 2014

    looking for this manual - ET-3

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A short circuit in the heater wire will cause an immediate loss of all flame, pilot and main; check the wiring diagram and make sure your pilot wires go to the PP and PP/TH terminals; make sure the terminals are clean and the connection is good; you are dealing with .320 volts DC, any bad connection drops the voltage below the required minimum.

Posted on Jun 28, 2009

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I have a Hayward H300. Pilot light will not stay lit when I release the gas valve to turn it to gas. I replaced the thermocouple. Any sugestions?



Thank you for posting your question here on Fixya.com.



Make sure you did not reverse the red and white lead wires from the thermocouple as doing so will not hold the solenoid for the pilot open. If the wires are connected properly start next with the pilot head. You want to be sure the pilot flame is not partially blocked or that the gas mix is poor which you can tell by whether the flame is a nice tall, bright blue color or not.



If that checks out you need to check gas pressures at the inlet to the valve and to the pilot and check the gas valve itself for a bad solenoid.



If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at www.arrowpools.net. Positive feedback is appreciated once your problem is solved!


John

Aug 20, 2011 | Hayward H-series Electronic Gas Pool...

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I have a haywood H150 and checked current using a dcv meter and getting .56 volts from thermocoupler. Also checked current throughout unit and volts reading the same everywhere but pilot won't stay...


The solenoid inside the gas valve, the part that is supposed to assume the pilot light once the thermocouple is hot, is failing. You need a new gas valve. Your part number is HAXGSV0001 for natural gas or HAXGSVS0003 for propane.

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Jun 07, 2011 | Hayward H Series Millivolt 250,000 Btu...

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Spring start up of pool. cannot get pilot to light for furnace.


Maybe, but unlikely. The amount of gas that is released to the pilot is pretty small. I assume the heater is outside, where the slightest breeze would blow the gas away. I also assume you are having trouble lighting the pilot and you are wondering if maybe there is no gas, since you can't smell it? It may take a few minutes of holding the button down before the pilot will light, and once it does, you may not be able to see the flame in the light of day. If you wait until dark (or at least dusk) you should be able to see the flame of the pilot more easily. And don't forget to hold the button down for a minute or two after it lights to be sure the thermocouple has had time to heat up. If you release the button and the pilot goes out, you probably didn't wait long enough, but it will re-light easily. I hope you find this helpful. Good luck.

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The Thermocouple is the most likely cause. But before replacing it clean out the pilot orifice. Sounds like it may be partially clogged. You should have a nice wide flame that is hitting the thermocouple dead on. The thermocouple is a safety device that shuts the gas off if the pilot goes out. If it is defective no gas will flow. This is a very common problem with gas heaters.

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Hi I have an Hayward H Series pool heater and the pilot doesn't stay lit when I depress the control to turn it on. Any quick solution for that ?


Check the thermocouple that the pilot light heats up. If it is not working then the gas to the pilot will not stay on.

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make sure the flame hits the thermo couple if so then replace it lows has them in the water heater section thermo couple gets hot makes millivolt signal then opens gas valve

May 08, 2009 | Hayward H Series Millivolt 250,000 Btu...

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