Can’t offer any specifics as I don’t have your model. But the first thing I’d do is pull off the trim and see if you’ve got 12V at the switch. That’ll tell you if the problem is at the fan or upstream somewhere. My coach (SOB) has both a wall switch and a switch on the fan itself. Both have to be on for the fan to work. I don’t suppose you’ve got anything that simple going on?
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