H25
Panasonic
Discharge Pipe Temperature Sensor Fault
Unit stops and displays H25; often associated with abnormal discharge pipe temperature.
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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
Open or shorted discharge pipe thermistor, Poor thermal contact between sensor and pipe, Damaged sensor harness, Faulty outdoor PCB
How to Fix / Troubleshooting
Safety first: Turn off power and wait for components to cool before touching refrigerant pipes.
Steps:
- 1. Locate discharge pipe sensor: Find the thermistor clipped to the small-diameter high-pressure pipe near the compressor outlet.
- 2. Check attachment: Ensure the sensor is tightly clamped to the pipe with metal clip or strap and insulated if originally covered.
- 3. Inspect wiring: Look for damage or loose connectors. Reseat on the PCB.
- 4. Replace if faulty: If resistance is out of spec or sensor is damaged, install a new Panasonic discharge pipe thermistor.
If H25 persists, the outdoor PCB sensor circuit may be defective and should be replaced by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Discharge Pipe Thermistor
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