c5
Moderate
Daikin · Mini-Splits & Ductless Systems
Condenser Temperature Sensor Fault
Quick Answer
Error code C5 on your Daikin Mini-Splits & Ductless Systems means: Condenser Temperature Sensor Fault. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Locate the condenser thermistor on the outdoor unit coil
2
Measure thermistor resistance and compare to the Daikin temperature-resistance chart
3
Check the wiring from the sensor to the outdoor PCB for continuity
4
Reseat the connector and verify proper pin contact at the outdoor PCB
5
Replace if the resistance reading is significantly out of range
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Condenser thermistor
Sensor wire
Weather-resistant connectors
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