08/30/2026
Why does your RV AC keep tripping the breaker even after it's been cooling great for hours?
Had a customer call me with exactly that problem. The AC would run for hours and cool the rig down perfectly, then the breaker in the RV's electrical panel would trip. It kept happening, over and over.
When I got there, I checked the power coming in from the pedestal first. That was fine. So I started tracing the circuit back through the RV itself, and that's where it got interesting. The 20 amp breaker labeled "AC" wasn't actually interrupting the current to the air conditioner at all. Flip it off and the AC kept running. But when I switched off the adjacent 15 amp breaker labeled "water heater," the AC power died instantly.
The panel had been miswired at the factory. The labels didn't match the actual circuits behind them. A simple fix once you know what you're looking at, but a mistake that could easily leave someone guessing for a long time, or worse, working on the wrong circuit thinking it's dead.
This is a good reminder that electrical panels can be labeled wrong right out of the factory. If your RV AC keeps tripping breakers even though it's cooling fine, don't assume it's the AC unit itself. It could be a wiring or labeling issue further back in the panel.
I do mobile RV repair in Albuquerque and handle RV electrical issues like this one on site, no need to haul your rig anywhere. If something in your RV's electrical system is acting up, I come to you.