Error code reference
Panasonic Air Conditioner Error Code H23
Indoor heat exchanger temperature sensor abnormality
Indoor heat exchanger temperature sensor abnormality — sensor open or short circuit detected continuously for 5 seconds.
First step from the service manual
Check the connector connection; plug out connector from the indoor unit PCB and measure resistance.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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Get the full diagnostic procedure for H23.
- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
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