Forum Discussion
SCVJeff
Nov 14, 2013Explorer
First, the fan should never hum unless your inverter is in real trouble. There is likely a push switch that is controlled by the lid. Lid closed, fan off... Those are also famous for corroding or rusting that will cause exactly what you describe and its a common problem. Short term fix is to go on the roof, grab the plunger and twist to wear off the junk.
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