H15
Panasonic
Compressor Temperature Sensor Fault
Dehumidifier shows H15 and stops; compressor will not start.
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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 compressor discharge thermistor, Thermistor detached from compressor shell, Broken thermistor wiring, Faulty main control PCB sensor circuit
How to Fix / Troubleshooting
Safety first: Unplug the unit. The compressor and nearby pipes may be hot; allow to cool before touching.
- Locate sensor: Find the small sensor clipped or strapped to the compressor discharge line or compressor body, usually wrapped in insulation.
- Check attachment: Ensure the thermistor is firmly in contact with the compressor surface and not hanging loose. Reattach with a metal clip or high‑temperature tape if necessary.
- Inspect wiring and connector: Follow the two‑wire lead back to the main PCB. Reseat the connector and check for damage.
- Test resistance: With the sensor disconnected and the unit unplugged, measure resistance and compare to Panasonic’s temperature–resistance chart. Replace if open, shorted, or far out of range.
- If sensor is good: The main PCB’s sensor input may be defective. Board replacement is recommended and should be done by a qualified technician.
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Repair Difficulty
Hard
4/5
Required Part
Compressor Discharge Thermistor
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