RV Generator Repair in Denver, CO

RV Generator Repair in Denver, Colorado

Denver's 5,280-foot elevation is one of the most important factors in RV generator performance. Internal combustion engines lose approximately 3% of horsepower for every 1,000 feet of elevation gain, which means your Onan MicroQuiet 4000 is already operating at roughly 84% of its sea-level capacity before any maintenance issues arise. When you add a rich-running carburetor, a dirty air filter, or a failing voltage regulator, a Denver generator can shut down under load within minutes.

Onan MicroQuiet and BGE Series Service in Denver

The Onan MicroQuiet 3600 and 4000 series are the most common generators found in Class A and Class C motorhomes throughout the Denver metro. At altitude, the Onan's fixed-jet carburetor typically runs richer than necessary, resulting in black exhaust smoke, excessive fuel consumption, and the characteristic loading-up shutdown under AC load. We perform the full Onan tune-up and re-jet the carburetor for Denver's elevation. We also test the unit under realistic load using a calibrated load bank.

The Onan BGE and BGEL series found in older Class A coaches are carbureted LPG generators with their own altitude challenges. At 5,280 feet, LPG vapor pressure is slightly lower than at sea level, and the mix screw on these older carburetors often needs adjustment for clean running. We carry rebuild kits for the BGE carburetor.

Generac and Cummins RV Generator Diagnostics

Generac RV generators are common in fifth wheels and newer Class A coaches. The Generac Quietpact series uses an electronic fuel injection system that stores fault codes accessible with a scan tool. Cummins Onan Quiet Diesel units in premium diesel pushers require diesel-specific diagnostics including injector pressure testing and EGR inspection.

For any generator that trips on high engine temperature at Denver campgrounds, we inspect the exhaust outlet and compartment ventilation first. We can modify or extend generator exhaust routing when the installation geometry creates overheating.

Automatic Transfer Switch and Remote Start Service

An automatic transfer switch (ATS) that fails to transfer from shore power to generator is a frustrating problem that often mimics a generator failure. We test ATS units from Cummins, Progressive Industries, and Intellitec independently from the generator. After every generator service in the Denver metro, we verify that the ATS transfers cleanly and the remote start activates reliably.