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

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My heater ran for four hours then I smelled something burning and there was smole coming out of the vent...what could cause this?

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Nests inside the heater, or build up of soot on the heat exchanger. You should always have your heater serviced each year at the onset of heater season.

Posted on Dec 10, 2009

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