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travelrn2013's avatar
travelrn2013
Explorer
Apr 26, 2014

A/C can only run by itself, anything else trips it

We are now in Southern Texas and it's already a 100 degrees. Fifth wheel 33 ft with one middle a/c unit and 30 amp. I am packed in shade. It's not keeping very cool except in middle near it though ...
CA_Traveler's avatar
CA_Traveler
Explorer III
Apr 26, 2014
Likely something besides the AC is drawing amps, although a bad 30A breaker is certainly possible.

Leave the 30A and AC breakers on, all others off. AC on. Now see if you can find out what else is tripping the main breaker by turning the other breakers on one at a time and wait after each one.

Likely suspects are HW, charger and refer or some of each. Maybe engine block heater.

Bad/weak breaker and/or low voltage are factors.

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