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We have a 2023 Montana 3931FB. The Control Panel has a high pitch squeal that changes in pitch and intensity with load changes. With all switches off, the noise is unbearable. As any switch is turned on, the pitch and volume of the squeal subside. As long as I leave at least two circuits on, such as the Water Heater and the Canopy lights, all is quiet enough to sleep.
I have opened and got my head into every possible space and have absolutely zeroed in on the Control Panel as the source of this aggravation.
Any and all suggestions are appreciated.
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