Pulsar
Unstable Voltage / Frequency
Generator runs but voltage and frequency fluctuate noticeably; lights flicker and motors buzz.
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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
Failing AVR, Dirty or sticking throttle linkage, Inconsistent fuel pressure, Worn governor components
How to Fix / Troubleshooting
Safety first: Disconnect sensitive electronics from the generator until voltage is stable.
- Observe engine behavior: Listen for surging or hunting. If engine speed is unstable, focus on fuel and governor issues.
- Clean throttle and governor linkage: Remove dirt and lightly lubricate pivot points.
- Check fuel quality: Drain old fuel and refill with fresh gasoline or ensure stable LPG/NG supply.
- Inspect AVR connections: Loose AVR wiring can cause intermittent regulation.
If fluctuations persist, replace the AVR and have the governor system inspected by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Pulsar Automatic Voltage Regulator (AVR)
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