RV generator service, at your site.

What usually fails

Onan (Cummins) units dominate RVs, with Generac and a few others around. Their failures cluster tightly:

• Fuel gone bad in storage — gasoline varnishes over a desert summer; carburetors clog and fuel pumps die. The #1 Arizona generator failure, by a wide margin, is a rig that sat.
• Heat-soaked electronics — control boards and voltage regulators age fast in compartments that bake well past the outside temperature all summer.
• Starts, runs, dies under load — the generator carries lights fine, then quits when the AC compressor starts: fuel delivery, a tired pump, or a control fault, in roughly that order.
• Surging and hunting — RPM wandering up and down points at the carburetor and governor long before the engine itself.
• No crank / click only — often the house battery bank, not the generator; generators crank from batteries that sit neglected all summer.
• Exercise neglect — generators that never run under load between trips develop most of the above; manufacturers recommend regular loaded exercise for a reason.

Symptoms worth calling about

• Cranks but won't start — especially after storage
• Starts, then dies when the AC or microwave loads it
• Surging, hunting, or rough running
• Fault-code blink patterns on the start switch
• Runs but produces no power to the rig
• Fuel smell at the compartment (stop, ventilate, and mention it when you reach out)

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

On site: fault-code reading, fuel system diagnosis and carburetor service, fuel pump and filter replacement, spark and air service, battery and cranking tests, control board and regulator testing, and the routine service (oil, filters, plugs) that prevents most of it. Many starting and running problems are fixed in the one visit.

Honest limits: internal engine damage and stator/rotor electrical failures are major work — sometimes replacement work — and a mobile tech will level with you if a unit has reached that point. Also note altitude: a carbureted generator jetted for the desert floor runs rich at Flagstaff elevations; that's an adjustment conversation, not a breakdown.

Have this ready when you reach out

• Generator brand, model, and hours if the meter is readable (a photo of the data plate is ideal)
• The fault code, if it's blinking one — count the blinks
• When it last ran well, and whether the rig sat in storage since
• What happens, exactly: crank/no-crank, start/die, surge, or no output — and where the RV is parked

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.