Error code
tC5
Meaning
A secondary temperature sensor is giving bad readings
Moderate
What to do
Why this happens
Causes may include thermistor 2 resistance being out of range due to an open or short circuit, a wiring harness fault between thermistor 2 and PBA, or an abnormal temperature in the compressor area.
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 / Customer Repair Guide