Westinghouse
Engine Speed Misadjustment
Generator runs but frequency is consistently off (e.g., 55 Hz or 65 Hz) with no code
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Incorrect governor setting, binding throttle linkage, wrong controller frequency configuration (50/60 Hz), worn governor components
How to Fix / Troubleshooting
Safety first: Frequency adjustments require the generator to run under load. Only trained personnel with proper meters should perform this work. Open the main AC breaker to isolate from the home while adjusting.
- Verify controller setting: Confirm the controller is configured for the correct nominal frequency (usually 60 Hz in North America).
- Inspect linkage: Ensure the governor and throttle linkage move freely and are not obstructed.
- Adjust governor (technician): A technician can adjust the governor speed screw while monitoring frequency with a calibrated meter to bring it within specification.
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Repair Difficulty
Hard
4/5
Required Part
Engine Speed Governor Assembly
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