H22
Panasonic
Lid Temperature Sensor Short / Overheat
H22 appears during cooking, often when steam is high.
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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
Shorted lid NTC sensor, Moisture inside lid sensor connector, Damaged insulation on lid sensor cable, Shorted sensor input on PCB
How to Fix / Troubleshooting
Safety first: Disconnect power and allow the lid to cool before disassembly.
- Dry the lid area: Remove the inner lid and steam vent components. Wipe away condensation and allow the lid to air dry thoroughly.
- Inspect sensor and cable: Access the lid NTC sensor and its wiring. Look for melted insulation or corrosion at the connector. Clean light corrosion with contact cleaner and a soft brush.
- Test sensor resistance: At room temperature, measure the sensor resistance. A near-zero reading indicates a shorted sensor. Replace the lid NTC sensor assembly if shorted.
- PCB check: If the sensor and cable are good, the fault may be on the main PCB sensor input. Replace the main control PCB if H22 persists.
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Repair Difficulty
Hard
4/5
Required Part
Lid NTC temperature sensor
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