Question about Hayward 250kbtu Ng Pool Heater - Inground

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I have an H250 NG and when I light the pilot it goes out when I release the pilot button on the gas valve?

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The first thing That comes to mind is a bad pilot generator or thermopile. This makes a small half volt charge that energizes the magnets that open the two stages in the gas valve. Next would be a bad gas valve itself. You will need a milivolt meter to check both of these. Lastley is the safty circut. This is the string of switches that can shut the heater down if problems exist. Their are two sets of wires connected to the gas valve. One set goes down to the pilot, this is for the pilot generator. The other set is the safty circut. If you remove these wires and the pilot lightes and stays lit the problem is in the circut. Still no pilot then it is in the pilot or valve. Good luck.

Posted on May 28, 2010


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