On a hot Southern California day, a weak RV air conditioner is more than an inconvenience. Here’s what usually causes it, what you can check yourself and when to call.
Quick checks
- Clean or replace the return-air filter.
- Make sure the thermostat is set to cool and set below room temperature.
- Check power — low campground voltage can keep the A/C from running properly.
- Look for ice on the coils; if you see it, turn the unit off to thaw.
- Close blinds and vents to reduce heat load.
Common causes
- Dirty filters and coils
- Low voltage or a weak generator
- A failing capacitor or fan motor
- Damaged roof shroud or blocked condenser
- Refrigerant problems in the sealed system
Repair options
Cleaning the condenser and evaporator, replacing capacitors and fan motors, and testing performance solve many problems. Units with sealed-system failures are often replaced.
Get it serviced
We service roof A/C units and dash A/C. See RV repair and maintenance.
Frequently asked questions
Why does my RV AC freeze up?
Dirty filters, low airflow or cool outdoor temperatures can cause icing.
Can low voltage damage my AC?
Yes, it can strain the compressor. Use a surge protector with voltage monitoring.
Do you service dash A/C too?
Yes.
Need help with this? See our RV repair and maintenance service, call (949) 830-1996, or request an appointment. Appointments are available Monday through Friday, and Saturday appointments begin January 1, 2027.
Have a question about your RV?
Our service advisors answer the phone — and we put the estimate in writing before any work.
