Question about Hayward H Series Propane Electronic Ignition Heater 150,000 Btu

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My propane heater rumbles and thumps when turned on.

Its less noise when I turn the pump on to high speed.

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Sounds like you have a 2 speed pump. The heater needs high speed to operate. The noise is due to the low water flow. The water is actually boiling in the heater. Crank up the flow and that should solve your problems.

Posted on Dec 21, 2008


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