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Old 10-13-2009, 05:23 PM   #1
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Electric furnace makes loud noise like a breaker when it starts??


Can you help me figure out why my electric furnace in a new home (3 years) makes a very loud clicking/banging sounds, much like that of a breaker being switched, every time it turns on and off. It functions fine and heats the house without problem, but I'm concerned about this loud sound. Any thoughts?

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Old 10-13-2009, 05:30 PM   #2
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Electric furnace makes loud noise like a breaker when it starts??


It could possibly be a loud relay clicking a circuit closed.

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Old 10-13-2009, 05:36 PM   #3
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Electric furnace makes loud noise like a breaker when it starts??


Any thoughts on how I could figure out if it was a "loud relay?"
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Old 10-13-2009, 05:38 PM   #4
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Electric furnace makes loud noise like a breaker when it starts??


go near the panel when the unit turns on...there should be a little box that may hum when the unit is on. There would be an audible click and a possible hum from it. How loud are we talking? can you hear it across the house?
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Old 10-13-2009, 05:46 PM   #5
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Electric furnace makes loud noise like a breaker when it starts??


Ya, I can hear it across the house (25 feet away)
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Old 10-13-2009, 06:03 PM   #6
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Electric furnace makes loud noise like a breaker when it starts??


It sounds like a loud relay but some of these air handlers have a cover over the control panel that tends to amplify noise. My air handler had a LV transformer hum but it was much worse with the cover over the control panel. I modified the cover to dampen out the vibration.

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