RV air conditioning repair, at your site.

What usually fails

Most RV roof air conditioners (Dometic and Coleman are the common brands) die from a short list of causes:

• Start and run capacitors — the classic failure. The AC hums, clicks, or trips the breaker instead of starting the compressor.
• Dirty condenser/evaporator coils and filters — dust, cottonwood fluff, and foothill pine debris choke airflow and mimic bigger failures.
• Low or lost refrigerant charge — RV roof units are sealed systems; a leak usually means the unit is near end of life rather than a cheap recharge.
• Control board or thermostat faults — the unit ignores the thermostat, short-cycles, or runs the fan but never the compressor.
• Fan motor failure — squealing, grinding, or a fan that won't spin even with a push.
• Shore power problems — low voltage at a campground pedestal or a tired breaker can look exactly like a dead AC.

Symptoms worth calling about

• AC blows warm or room-temperature air
• Breaker trips when the compressor kicks on
• Unit hums but never starts; fan runs but no cooling
• Water dripping inside from the ceiling (often a drain or gasket issue, not the AC itself)
• Ice forming on the coils, or the unit freezing up overnight
• AC works on generator but not on shore power (or the reverse)

What a mobile tech can and can't do on site

On site: full electrical testing (capacitors, contactors, control boards), coil and filter cleaning, thermostat replacement, fan motor swaps, start-capacitor replacement, checking your shore-power voltage, and complete unit replacement in many cases — a new roof unit can typically be installed in the driveway.

Honest limits: sealed refrigerant systems on RV roof ACs are not practically rechargeable the way a home AC is — if the diagnosis is lost charge from a leak, replacement is usually the real conversation, and the tech should explain why rather than sell a recharge. Rooftop work also depends on safe roof access and weather.

Have this ready when you call

• AC brand and model if you can read the label (a photo of the ceiling assembly helps)
• Does the fan run? Does the compressor try to start? Any breaker tripping?
• Are you on shore power, generator, or both — and did it fail on both?
• RV year/make/model, and where it's parked (home, storage, campground + site)

AC repair, city by city

Where AC work comes up most — and what makes it different there:

• RV AC repair in Sacramento — 100°F heat, stored rigs, and loaded pedestals at Cal Expo and SacWest.
• RV AC repair in Roseville — storage-pickup discoveries and driveway deadlines.
• RV AC repair in Folsom — noon-to-midnight lake-season runtime and pre-Tahoe checks.

Other services

Get a mobile tech to look at it

Tell us what's happening and where the RV is parked, and we'll match you with one local mobile technician for your area — not a shared list of companies.

Educational note: any cost ranges mentioned on this site are typical, general information only. Your technician confirms the service-call fee and an exact quote directly with you before work begins.