On the radio, if you do not have the owner's manual download it from the manufacturer's web site,, NOTE< the Sirius module may have its own manual and may be hidden under the dash connected to the radio with a multi-in plug.
The "Factory reset" procedure, usually involves a multi finger button press or a paper clip in a hole type procedure.. I can not tell you what it is without finding out the precise make and model and downloading the manuals.. So I'll let you do that.
The air conditioners.. Do you have one or two? If two the answer is easy, If one it may well be the same
on the Generator are, usually TWO circuit breakers.. on a 30 amp RV ONE will be for the air conditioner (This is for a Class A, a Trailer with portable generator this does not apply)
Check the breakers on the genny.
In addition there is some fancy stuff done by the Auto Transfer Switch and finally, IF you have an energy management system (The load shedding kind) it can have issues, there may also be a switch somewhere that needs to be adjusted. (Front/Rear/Both switch)