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

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IF error ignition fault lockout

Hi I have a hayward h400 and have no used the heater for about 4 or 5 months. I guess it would have been a good idea to turn on for a little bit once a month. Now when I turn it on i hear air coming out but do not hear the ignition go on. It tries several times then gives me an error of IF ignition Fault lockout. Is there anything I could do to fix?


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You are absolutely right. This is the third season for my pool and last year I had the same problem on my H400 heater; an IF (ignition Failure) code. The spider webs on mine were up in the brass orifices, not just on the tip. I pulled each of them out (7/16" wrench); if I had had a pipe cleaner I might have been able to clean them without taking them out. If you use a pipe cleaner, I recommend running it 1.25" to 1.5" up into the brass fitting to get all the webs cleaned out.

The heater ignited the first try after the cleaning and is working normally. Thanks for the input from ifixpools.

Posted on Feb 09, 2009

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If it has not fired in some time, the odds are high that a small spider web is blocking the burner orifices. These are the brass fittings exposed at the front of the burner tray. It does not take much to block gas flow. Each burner should have a pipe cleaner run into the orifice. A small zip ties will also work. You're looking for a small web on the end of the cleaner.

The problem lies in the blockage. The ignitor and flame sensor sit at two different burners. Blockage of a burner at those locations will not ignite or will not sense flame to allow the heater to stay on.

Restart after cleaning and see what happens. Otherwise, you may have a bad ignitior.

Posted on Jan 01, 2009

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