“Pop” after furnace cycles off? - Dutchmen Owners
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Old 04-30-2022, 03:42 PM   #1
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Join Date: Jul 2016
Location: Spokane
Posts: 115
Washington
“Pop” after furnace cycles off?

In our 2016 Voltage, the furnace has started to make a single “pop” noise about 30 seconds to a minute after it shuts down after a heating cycle. It sounds like an exhaust gas pop and there is only one pop. And it’s not terribly loud, but enough where I can hear it inside the trailer. I don’t recall hearing this for most of the 5 years we’ve owned it. The furnace is otherwise working perfectly. Thoughts?
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Old 05-01-2022, 02:36 PM   #2
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Join Date: Jan 2018
Location: Beaver Dam
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Wisconsin
I am not a well trained expert on gas furnace issues, so my advice is worth what you will pay for it.

The furnace fan should continue to run after the burner shuts "off". Normally this would clear any unburned gas and cool any hot spots that would reignite.

Does the fan continue running for a while after burner shuts "off"?

If not, there is a fault to be corrected.

If your furnace does not have a fan, then the after burner pop is possible. There will be gas in the burner mixing tube when the gas valve closes. A hot spot on the burner can reignite that small reserve of gas causing a pop.

Clean the burner tube and burner openings. Accumulated stuff may be hot enough to reignite. Replace any corroded or damaged parts.

Clean exhaust pipe.

The furnace may have a leaky gas valve.
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