For the first time, a very high pitched squeal sounded throughout our 2008 Montana 5th wheel and stayed on for quite awhile. We turned off all the breakers and the sound remained.
The TV and surround sound wasn't on so we are confused about the sound that did seem to be coming throughout all the speakers. It seems like when the furnace shut off is then the high pitched noise stopped.
Is there really a connection to a furnace making this high pitch noise through the speakers and why??