Question about Hayward H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1

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Gas pool heater pilot will not stay lit - Hayward H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1

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  • John Prohaska
    John Prohaska May 11, 2010

    When it lights, can you see the flame? What color is the flame if you can see it? Can you get a millivolt reading off the generator to see if the power output is high enough?

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Depending on the make and model of your heater, the first thing I would check for is gas pressure. If it is sufficient, check the pilot assembly for corrosion and/or a damaged pilot tube. Sometimes replacing the entire pilot assembly is a sure fix and also replaces the pilot generator that degrades over time. A new pilot assembly takes care of a couple of problems by improving gas flow and millivolts generated. Also, the orifice inside the pilot assembly could be corroded or clogged.

Posted on Sep 15, 2009

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1 Answer

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

Jul 01, 2009 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

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Your problem is the pilot generator where the flame is by the burners. This needs to be repalced. That is what is causing the pilot to go out and not start. It is a flame sensor and also tells the gas valve when to release more or less gas.

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1 Answer

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