I have a Humming or buzzing noise that seems to come from my Front AC Unit AC1 on my 2002 Pace Arrow 38 Ft Gasoline engine. The coach has the Intellitec Electronic Climate Control. This sound comes and goes makes no difference if the air conditioner is running or not. There is a solar panel on the top of the AC Unit. Even if I shut the AC unit off I can still hear the Buzzing or humming noise and can feel a vibration if I put my hand on the ceiling around the AC unit. after awhile it will stop. It is very load. the only thing that will stop it is if I kill the main circuit breakers or unplug the wiring harness from the unit which contains the solar panel as well as all of the controls for the AC unit. Could it be something with the solar Panel or the AC Compressor? Any suggestions. what else is up there? Battery charger? Control panel?
Mel_B