GE Loss of Excitation / No Output

Generator runs but does not produce power (no AC output)

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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

Failed automatic voltage regulator, Open field winding, Broken alternator output leads, Tripped or failed generator main breaker

How to Fix / Troubleshooting

Safety First: Turn OFF the generator and utility breakers before opening electrical compartments. Use a properly rated multimeter.

  • 1. Check generator main breaker: Ensure the breaker on the GE generator is in the ON position and has not tripped. Reset if necessary.
  • 2. Measure voltage at generator lugs: With the generator running and breaker ON, carefully measure voltage at the output lugs. If zero, suspect alternator or AVR issues.
  • 3. Inspect alternator wiring: Open the alternator terminal box and verify all connections are tight and not burned.
  • 4. Examine AVR connections: Ensure the AVR module is securely connected and not visibly damaged. Replace with a GE-compatible AVR if suspected faulty.
  • 5. If no excitation is present: Field flashing or alternator repair may be required and should be performed by a generator technician.
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Repair Difficulty

Hard 4/5

Required Part

Automatic Voltage Regulator
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