Common Air Conditioner Problems in RVs and Solutions.
RV AC Repair Burlington WA | Mobile RV Air Conditioning Service
When the heat hits Washington and your RV’s air conditioner decides to quit, it’s not just uncomfortable—it can ruin the whole trip. Whether you’re boondocking near Bellingham or parked under the summer sun in Mount Vernon, a faulty AC is a major buzzkill.
At Odyssey Mobile RV Repair, we service RV air conditioners all along the I-5 corridor. Here are the most common issues we see with rooftop AC units—and what you can do to keep your cool on the road.
1. Blowing Air, But Not Cold
The Problem: Your AC fan is working, but the air coming out isn’t cool.
The Fix: This usually points to low refrigerant, a bad capacitor, or a failing compressor. Unlike residential units, most RV ACs are sealed systems, so if refrigerant is the issue, it likely means a full replacement is needed. Capacitors, however, are serviceable on-site.
2. Unit Won’t Turn On
The Problem: No sound, no fan, no response at all.
The Fix: First, check your circuit breakers and fuses—especially if you’re running other high-load appliances. Next, test your thermostat. If it’s digital, make sure it has power or replace the batteries. If all checks out, the issue may be a faulty control board or a bad capacitor.
3. Air Conditioner Freezes Up
The Problem: Ice forming on the coils or cool air suddenly stops.
The Fix: Dirty filters, low airflow, or high humidity are the top suspects. Turn off the unit, let it thaw, and clean or replace your air filter. Run the fan only for 30 minutes before restarting the cooling cycle. If it keeps freezing, the evaporator coil or blower motor could be to blame.
4. Strange Noises or Vibrations
The Problem: Loud humming, buzzing, or rattling up top.
The Fix: Loose fan blades, worn bearings, or even debris in the unit can cause this. It’s worth opening the shroud and inspecting for anything obvious. If the noise persists, have a mobile RV technician inspect the motor and mounting brackets to prevent damage from vibration.
5. Bad Smells When Running
The Problem: Musty or burning smells when the AC is running.
The Fix: A musty odor often points to mold inside the evaporator or ducting—common if the AC hasn’t been used in months. A burning smell could indicate electrical failure. Turn the unit off immediately and call a professional.
We’ll Keep You Cool
There’s no reason to sweat it out while waiting on a service center. From Burlington to Bellingham, Odyssey Mobile RV Repair comes to you. We diagnose, repair, and replace RV air conditioning units without the hassle of towing your rig.
