Occasional Loud Bang from somewhere
Hello. I have a combo air conditioner and heating in one system. It is a very narrow and tall furnace if it matters. Long time ago, there was a loud bang once and I had a tech come out and repair it. Well he found 3 leaks and he took care of that. But the loud bang would still come up afterwards again on occasion. I asked him about that and he didn’t know what to tell me, so I just thought it is the way it operates. Basically, pilot comes on, I hear the other burners light up and after about 10 seconds the loud bang may happen. It only happens on occasion, very seldom. Now I haven’t been at my place for a while, due to some circumstances I moved in to my parents place, but I was wondering is this something that sounds dangerous?

dasensation
in Heating 11 years and 6 months ago
2
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daveinbedstuy | 11 years and 6 months ago
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Does it sound like it’s the ductwork? I’ve heard the aluminum ductwork “bang” upon sudden changes in temperature.

dasensation | 11 years and 6 months ago
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Also because it is a building I could have sworn that I heard that lound bang come from other apartments too. Thanks.