AC kicks off on hot afternoons
2019 travel trailer, 15,000 BTU rooftop AC, 30A service. 30A pedestal, through a 25 ft 30A extension cord
Customer says: Every afternoon the AC shuts off, then comes back on a few minutes later. The lights dim when it starts.
Tests you can run
- Voltage at the pedestal, nothing running
- Voltage at the coach panel with the AC running
- Voltage at the pedestal outlet with the AC running
- Infrared and look at the cord ends and connections
- Clamp amps on the shore cord with the AC running
- Test the run capacitor
- Check the coach main breaker
- Replace the AC control board
Repair options
The lesson behind this case
Keep going on air conditioning
Learn it
Prove it
- AC hums and trips
- AC runs but barely cools
- AC ices up and barely blows
- AC does nothing, thermostat is blank
- Breaker trips when the AC starts