Error code
tC5
Meaning
A secondary temperature sensor is giving bad readings
Moderate
What to do
Why this happens
Thermistor 2 may have resistance out of range due to being open or shorted; wiring could be damaged or disconnected; there might also be a PCB sensor circuit failure.
How to fix it
After cleaning lint and checking the vent, if the error persists, the secondary temperature sensor needs replacing. This one needs a professional technician.
SourceSamsung service manual