I have a 2013 Fleetwood Excursion RV and was recently camping when the AC and heat woul not come on. I checked the gas line, breakers and turned it off for 5 to 10 minutes. When I turned it back on th...
Agree with others that it sounds like low battery power.
Most tire outlets will load test your batteries for free -- even though you had your inverter and batteries "checked out" I would drop by and have the batteries retested. You should also check to make sure that battery connections are tight and not corroded - same with grounds.
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