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QUESTION:I have an intermittent problem with this older model furnace. It will
occasionally fire up "with a bang". this explosion being enough to
sometimes blow out the pilot light. This usually happens first thing in
the morning or on return from a vacation. It has been checked by two
different contractors but naturally won't do it when they are here. Does
anyone have any suggestions other than replacing the complete unit?
ANSWER: I would think this is being caused by a leaking gas valve. This will
allow a gradual buildup over a longer period of time. My experience
however is not with residential, but industrial burners. I doubt that
you could get any one to repair or rebuild the gas valve. I hope you
get someone to fix this.
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