What It Means
Malfunction of thermistor (Refrigerant circuit).
Daikin Split & Multi-Split
Daikin Split & Multi-Split Error Code J8
Troubleshooting guide for the Daikin Split & Multi-Split system fault J8.
Possible Causes
- Defective connection of thermistor.
- Defective liquid pipe thermistor.
- Defective outdoor unit PCB.
Not sure which one it is — or if it's none of these? Try ACLogics today.
Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
New to this code? Click to see why this happens
Full Diagnosis
Malfunction of thermistor (Refrigerant circuit)
All Recorded Causes
Defective connection of thermistor Defective liquid pipe thermistor Defective outdoor unit PCB
Verify Before Replacing Parts
- Confirm the exact Daikin model family and split/ multi split context before acting on a generic code description.
- Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since defective connection of thermistor.
- Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm defective liquid pipe thermistor.
- After the correction, run the system long enough to confirm the split/ multi split fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Daikin Split & Multi-Split diagnostics step-by-step — so you confirm the cause before swapping parts.
