RV Generator Repair in Conroe

A generator that will not start after sitting through a hot, humid Montgomery County season is one of the most common calls we take. Carburetor work runs $350 to $800, and it is almost always the fix.

What we repair on site

• Will not start: fuel system, carburetor, spark, starter, and battery faults, diagnosed in that order.
• Starts and dies: usually a fuel delivery problem starving the engine once it is running under its own vacuum.
• No AC output despite running: a failed breaker, a bad stator, or a control board fault.
• Surging or unstable output: often a carburetor issue affecting governor response, sometimes an electronic governor fault on newer units.
• Routine service: oil and filter, air filter, spark plug, and a load test to confirm the unit will actually carry a load when you need it.

Why fuel is the usual culprit here

Ethanol-blended gasoline left sitting in a carburetor bowl absorbs moisture from humid air, separates, and leaves a varnish residue in the tiny jets that meter fuel. Montgomery County’s muggy season runs from roughly mid-April into late October, and a generator that sat through even part of that with fuel in the bowl is a strong candidate for exactly this problem. A carburetor clean, or a rebuild if the jets are badly gummed, restores it in most cases without needing a new carburetor or engine work.

What things cost

Same ranges as the pricing page. We diagnose the failure order (fuel, then spark, then electrical) rather than guessing, since a carburetor clean does nothing for a bad starter.

The maintenance that prevents this call

Run it monthly, under load. Idling for five minutes with nothing plugged in does not exercise the carburetor or the charging system the way a real load does. Running the AC or another real draw for twenty to thirty minutes once a month is the cheapest insurance against a no-start call.

Use fresh fuel, or a stabilizer, before a long sit. If the rig is going into a storage yard for an extended stretch, either run the tank low and add stabilized fuel, or plan on a carburetor service before the next trip.

Consider it before hurricane season, not during it. If you plan to rely on the generator during a power outage, a pre-season check and load test beats discovering a fuel problem when you actually need backup power. Carbon monoxide safety matters here too: run it outdoors only, away from windows and doors, and confirm your CO alarm works before storm season.

Diagnosing in the right order

We do not start by pulling the carburetor apart on suspicion. The check runs fuel, then spark, then electrical, in that order, because it is the order that actually reflects failure frequency here. Fuel delivery accounts for the large majority of no-start calls, so confirming or ruling it out first, checking for fuel at the carburetor, smelling for stale gasoline, and inspecting the bowl, saves time and keeps the bill honest. Only once fuel is confirmed good do we move to spark (plug condition, ignition coil) and then electrical (starter, solenoid, battery, safety interlocks like a low-oil shutdown switch).

Portable versus built-in units

Built-in Onan generators on motorhomes are wired into the coach’s transfer switch and typically start with a dash or remote switch; portable units sit separately and connect through a cord. Both fail the same way from stale fuel and disuse, but access differs: a built-in unit’s compartment is usually a tight, purpose-built space, while a portable unit is easier to service but also easier to leave forgotten in a storage bay through an entire season. Either way, the monthly run-under-load habit matters more than which type you own.

Where we work

On site across Conroe, Montgomery, Willis, The Woodlands, Magnolia, New Caney, and Huntsville. The Onan generators page covers model-specific detail, and the repair cost calculator prices your specific symptom.