Timing is the diagnostic clue. A shutdown after seconds is different from a shutdown after 20 minutes in extreme heat.
Stops after a few seconds
Look for thermostat/control behavior, low voltage, compressor startup failure or overload clicking. Do not keep forcing restarts.
Stops after several minutes
Check for icing, restricted airflow, dirty filters, blocked returns and freeze-sensor behavior. If the breaker trips, follow breaker-trip diagnosis instead of resetting repeatedly.
Stops only on generator or 30-amp hookups
Suspect voltage, generator capacity, load management or other high-draw appliances. Reduce loads and confirm power conditions.
Tools, difficulty and likely cost
- Difficulty: Beginner for timing and airflow checks; pro for current draw and electrical diagnosis.
- Useful tools: Timer, thermometer, power monitor, flashlight.
- Cost range: Load and airflow fixes may be free; electrical component repairs vary.
Related RV Solver pages
- RV AC short cycling
- RV AC breaker keeps tripping
- RV AC freezes up
- RV AC hums but won't start
- RV AC low-voltage symptoms
FAQ
Why does my A/C run for 10 minutes then stop?
Possible causes include thermostat satisfaction, icing, overheating, voltage drop or freeze protection.
Can a dirty filter make it shut off?
Yes. Restricted airflow can cause icing, poor cooling and protective cycling.
What if the breaker is off afterward?
Use breaker-trip troubleshooting and leave the unit off after a repeated trip.