S03

Panasonic S03 Error Code – Humidity Sensor Failure

Air Conditioner · MEDIUM Severity

MEDIUM severity Air Conditioner Model: Panasonic Inverter AC (S/E series)
What This Error Means
Humidity sensor failure
Diagnostic & Repair Steps
1
Power Reset
Turn off at breaker, wait 5 min, restart. 🔧 None
RESET ~5 min
2
Inspect Humidity Sensor
Locate humidity sensor on indoor PCB. 🔧 Flashlight
INSPECT ~10 min
3
Replace Indoor Board
Panasonic specifies replacing indoor board for humidity sensor failure. 🔧 New indoor PCB
REPLACE ~30 min
4
Verify Error Cleared
Restart unit and confirm no error. 🔧 None
CHECK ~5 min
5
Contact Panasonic Support
If error persists contact support. 🔧 Phone or internet
CHECK ~5 min

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Related Panasonic Error Codes
S01 Room Temp Sensor Failure S02 Indoor Coil Sensor Failure S04 Compressor Temp Sensor Failure S05 Outdoor Coil Sensor Failure S06 Outdoor Air Sensor Failure S07 Outdoor Current Sensor Failure