What is the fuse that is blowing marked for?
The air conditioner is operated by the 120 VAC shore power, that is on a circuit breaker not a fuse.
The air conditioner does use 12 VDC for the controls (the fuses are on the 12 VDC side), but it is unusually for that to blow a fuse. Maybe something else is on that fuse, like the refrigerator and/or water heater controls, has gone bad.
Rick & Debbie; Brandy, Dexter R.I.P., & Fritz R.I.P. (The Doxie "Kids")
2015 Jayco Pinnacle 36RSQS 5'er
2011 Rockwood Windjammer 3001W (Traded)
2013 Chevy Silverado 3500HD LTZ, 6.6L Diesel Dually; B&W Goose Neck and Companion 5'er hitch