Most likely the AC has worked loose a little. Pull the cover and tighten the mounting bolts and see if that doesn't solve the problem. Also, while you're up there check for partially clogged drain holes.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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