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Discussion Starter · #1 ·
Hi there. My furnace is making a humming sound shortly after it turns on. The sound stops shortly after — while the fan is still running and pushing heat. Any ideas why or what is causing the sound?
 

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I’m not an HVAC guy but to help them diagnose your furnace, you may want to list brand, model number, etc. so they can better understand what might be going on.
 

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Post a video of it. Most likely it is the sound of the gas burners or if it is a high efficiency furnace it may have a exhaust fan and that may be wearing out and noisy.
 
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