F6
Hitachi
Condenser Temperature Sensor Fault
Freezer displays F6 and may shut down or run in a protective mode
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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
Defective condenser thermistor, Sensor not properly mounted to condenser, Damaged wiring harness, Faulty main control PCB
How to Fix / Troubleshooting
Safety first: Disconnect power. Be careful of sharp condenser fins and hot components.
- Locate condenser sensor: At the rear or bottom of the freezer, find the condenser coil. The sensor is usually clipped to the coil or nearby tubing.
- Inspect mounting: Confirm the sensor is firmly attached to the condenser surface and not hanging loose.
- Check wiring: Follow the sensor wires back to the main control PCB, looking for damage or loose connectors.
- Measure resistance: Disconnect the sensor and test with a multimeter. Compare to Hitachi's resistance chart. Replace if open or shorted.
- Replace sensor: Install a new Hitachi condenser thermistor and secure it in the original location.
- Control PCB replacement: If the sensor and wiring are good, replace the main control PCB as the likely cause of F6.
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Repair Difficulty
Medium
3/5
Required Part
Condenser Thermistor
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