I suggest you have a RV tech check out your A/C. could be a loose wire joint. Maybe a $15 capacitor. dirty filter. dirty coils. any number of things. but if you don't know about them have a tech look see.
2011 Keystone Sprinter 323BHS. Retired Master Electrician. Retired Building Inspector.
All Motor Homes are RV's. All RV's are not Motor Homes.