RV AC Not Cooling? Diagnosis & Repair

When your RV air conditioner stops cooling in the middle of a Gulf Coast summer, comfort becomes impossible fast. Temperatures inside an unair-conditioned RV can exceed 120 degrees in Sarasota and Bradenton. Sun Coast RV Service specializes in rapid AC diagnosis and repair — most cooling issues are resolved in a single visit.

Common Reasons Your RV AC Isn't Cooling

After thousands of AC service calls across Southwest Florida, these are the issues we see most frequently:

• Failed run capacitor — The single most common AC failure. Capacitors weaken in sustained heat. Symptoms include the compressor humming but not starting, or the fan running without cooling. Replacement typically takes 30-45 minutes.
• Dirty condenser coils — Gulf Coast pollen, salt spray, and dust clog condenser fins, reducing airflow and cooling capacity. We clean coils on-site and show you how to maintain them between visits.
• Low or leaking refrigerant — Vibration from travel can cause refrigerant line leaks over time. We locate leaks, repair connections, and recharge the system to manufacturer specifications.
• Frozen evaporator coil — Restricted airflow from a dirty filter or low refrigerant can cause ice buildup on the indoor coil. We thaw, diagnose the root cause, and fix it.
• Thermostat malfunction — A faulty thermostat may not signal the compressor to cycle. We test and replace analog or digital thermostats on all major brands.
• Compressor failure — The most expensive AC failure. We diagnose compressor issues accurately and help you decide between repair and full unit replacement.

What to Expect During Our Service Call

Our tech arrives with a complete AC diagnostic toolkit — amp clamps, manifold gauges, multimeters, and thermal cameras. We test the compressor, capacitor, fan motor, thermostat, and refrigerant levels before recommending any repair. You get a written estimate before we start work, and the $225 service call applies toward your total.

Brands We Service

Dometic, Coleman-Mach, Advent Air, Atwood, Furrion — we work on every major rooftop AC brand. Our vans carry common replacement parts including capacitors, fan motors, and thermostats for same-visit repair.