# House generator that would not hold load, plus a transfer switch fault

The house generator started and ran but dropped out under any real load, and the coach would occasionally fail to pick up shore power at all. The owner had bought three rounds of fuel system parts elsewhere. The generator had years of light load running behind it and the transfer switch had a heat damaged contact set that nobody had opened.

## Vehicle

31 foot Class C, Ford E450 chassis, Onan house generator

## Operations performed

- In depth diagnostic hour, generator load tested and compression checked before parts talk
- Exhaust and combustion chamber inspected, wet stacking deposits documented photographically
- Transfer switch opened, heat damaged contacts and a discolored neutral lug found
- Transfer switch replaced and torque values recorded on every terminal
- Shore power cord end and the inlet receptacle inspected, inlet replaced for heat damage
- Generator control board and windings tested, findings presented with numbers to the owner
- House generator serviced and load banked to confirm it held rated output before delivery

## Outcome

The owner got a compression number and a photograph instead of a fourth guess, and chose the scope with the actual condition in front of them. Note the boundary: this was the house generator and the coach electrical system. Chassis engine and drivetrain work is not performed at this facility.

## Numbers

- Price band: $400 to $8,500 plus
- Calendar time: 3 business days to 2 weeks

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Source: https://ocrv.club/case-studies/house-generator-and-shore-power-fault-on-a-class-c
OCRV Center, 23281 La Palma Ave, Yorba Linda, CA 92887
Phone (949) 799-3387. Email info@ocrvcenter.com.
Serving Hacienda Heights and the surrounding area. 18.4 miles, 24 to 38 minutes via SR-60 west to Fullerton Rd, then south to La Palma Ave.
In shop work only. All estimates are priced and credited against an authorized repair.