I replaced the plastic 'thing' around the edges. I think it had a connection that plugged in to either the fan or the switch. My bet is this may have fallen out. By the way, the reason I replace the thing is when up on the roof putting on a new rubber gasket, I thought the plastic looked a bit yellow. So I pushed on it a little bit and it broke in my hands. So be careful when messing around with it!!!
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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