I have a similar door and mine quit after a year or so. Don’t think it’s replaceable. I didn’t look at it often and don’t miss it. My go-to source for electric quality is the remote display for mt EMS. If it says all is good I flip the main breakers to “ON”.
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks