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Question DetailsAsked on 6/27/2017

the pilot on my hayward h200 pool heater is lit but the burners wont ignite, whats the problem

pilot is lit and I can smell gas when I turn the switch to on position but no flame

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1 Answer


You should NOT smell gas before ignites, though you commonly do get a puff of gas smell upon ignition before the furnace flue starts drawing correctly.

Depending on age of system, could be a blockage of the gas (blocked gas tube to the burner for instance), cracked or disconnected gas supply tube, rust piling up on the burner so blocking the flow of gas, the burner assembly not seated correctly in its seat or pins so the gas flow from the manifold is not going into the burner assembly correctly. Any of the above is a potentially dangerous situation that should be remedied before use.

Another possibility if a failed gas control valve - so turning the knob to ON is not opening the gas valve, but you are getting some gas leakage around the valve stem so smelling gas coming from the knob shaft.

Another possibility, though would usually ignite in a couple of seconds (possibly with an explosion or blowout from the firebox depending on how much gas accumulated) is the pilot or its deflector finger is not properly located relative to the burner (see manual), so the gas coming from the burner does not pass through the pilot flame as it comes out of the burner, so it could fail to ignite and fill the top of the firebox and be going up the flue before it spreads out enough in the firebox to finally ignite - usually with a goodly whoosh or boom and accompanying safety and fire risk.

Same thing happens if the pilot/thermocouple/thermopile assembly is not properly locked into position so it is sitting off to the side or drooping down relative to the burner, so the pliot flame is not directly in the path of the gas coming out of the burner orifices at that position.

Answered 3 years ago by LCD

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