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

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H400 Lights, but turns off after 2 seconds

I already have a bill for $600 and the guy is coming out again. THe gas company gave me a huge meter and says pressure and volume are good. no leaks in the pipe. Heater problem. I have verified ignition by seeing blue flame thru the sight glass

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There may be a pressure regulator internal to the unit that has failed. For safety, most gas appliances monitor the output of the internal regulator; in a situation where the gas pressure is unstable, if the main burner does not ignite within a finite period, they will shut down to avoid a buildup of unburned gases that could pop your windows out (or worse) if the ignitor keeps trying.

Posted on Jun 17, 2009

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Posted on Jan 02, 2017

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