H3
Klarstein Compressor Overload Protection / Overcurrent

Klarstein AC stops with H3 code; compressor does not restart.

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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

Blocked condenser, failed condenser fan, incorrect supply voltage, failing compressor, main PCB current sensing fault

How to Fix / Troubleshooting

Safety: High-voltage and compressor circuits are involved. Unplug or isolate power before inspection.

Steps:

  • Airflow and cleaning: Clean condenser coil and ensure fan operation as described for E8.
  • Voltage check: Verify mains voltage is within specification. Persistent low or high voltage can trigger H3.
  • Fan and capacitor: Confirm condenser fan runs at full speed; test and replace fan capacitor if needed.
  • Compressor health: If the compressor is extremely hot to touch and frequently trips, it may be failing internally and must be evaluated by a refrigeration technician.

H3 that recurs after airflow and electrical checks usually indicates a compressor or PCB issue requiring professional service.

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Repair Difficulty

Professional Required 5/5

Required Part

Compressor Assembly
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