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02-15-2021, 07:21 AM
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#1
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Established Member
Join Date: Mar 2020
Location: Grapevine
Posts: 13
M.O.C. #26003
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High Pitched "Noise/Squeal" from electrical cabinet.
On my 2017 3911FB, I get a high pitch noise from the C.B./Fuse cabinet anytime the furnace runs. Any ideas?
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02-15-2021, 11:05 AM
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#2
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,457
M.O.C. #4831
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It may be the fan on the converter portion of the panel. The heater fan sucks a lot of 12V. Ideally that 12V comes from your batteries. The converter replaces the 12V used. The production of the 12V from 120V causes heat which the converter fan mitigates.
You might want to check your batteries are fully charged and have adequate water if they are lead acid.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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02-15-2021, 05:05 PM
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#3
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,224
M.O.C. #6433
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Sounds like maybe a bad bearing. Converter fan is a good guess. Also, if your furnace and breaker panel are close, it could be the furnace fan making the noise. Squeal is not a typical electrical noise.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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02-16-2021, 04:53 AM
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#4
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,180
M.O.C. #25165
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Quote:
Originally Posted by BB_TX
Sounds like maybe a bad bearing. Converter fan is a good guess. Also, if your furnace and breaker panel are close, it could be the furnace fan making the noise. Squeal is not a typical electrical noise.
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I guess you've never been shocked? 
__________________
Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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02-16-2021, 08:57 AM
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#5
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,224
M.O.C. #6433
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Quote:
Originally Posted by RMcNeal
I guess you've never been shocked? |
OK, I will give you that one. And yes, I have, many times as an EE.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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