A 1997 Holiday Rambler Vacationer owner turned to Reddit after their RV suddenly lost air conditioning, outlet power, and microwave access even though the generator was running. Before posting, they had already restarted the generator, reset the breakers both inside the RV and on the generator, and reset a GFCI outlet. Commenters suggested checking the transfer switch, which allows an RV to receive power from either shore power or its onboard generator. The original poster later updated the thread to say they found the transfer switch and fixed the issue.