If it's a Maxxair fan it will sense the obstruction and stop itself. I was worried because mine did the same thing after installing Maxxair covers on my Maxxair fans. They now only open about 80-90% as far as they did so I called and read on their site. The motors are made to sense the cover and stop opening.
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1999 Suburban 2500 4x4
2016 Jayflight 23RB Elite, Fiberglass, Polar Package
400w Renogy RV solar kit w/ Bluetooth, 100w Renogy solar suitcase
430 amp/hr 6v battery bank
1000w Renogy hard wired inverter
2011 F350 Lariat, DWR 4x4, 6.7 turbo diesel
2017 Open Range, Mesa Ridge 374BHS
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