S04
Panasonic S04 Error Code – Compressor Temp Sensor Failure
Air Conditioner · HIGH Severity
What This Error Means
Compressor temperature sensor failure
Diagnostic & Repair Steps
1
Power Reset
Turn off at breaker, wait 5 min, restart.
Turn off at breaker, wait 5 min, restart.
RESET
~5 min
2
Locate Compressor Temp Sensor
Find sensor on outdoor compressor.
Find sensor on outdoor compressor.
INSPECT
~10 min
3
Check Sensor Continuity
Refer to Panasonic service manual. ⚠️ Disconnect power first
Refer to Panasonic service manual. ⚠️ Disconnect power first
TEST
~15 min
4
Replace Sensor
Replace if failed continuity test.
Replace if failed continuity test.
REPLACE
~20 min
5
Contact Panasonic Support
Contact with model and error details.
Contact with model and error details.
CHECK
~5 min
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