Error code
tCA
Meaning
A fifth temperature sensor is reading incorrectly
Moderate
What to do
Why this happens
The issue may be due to Thermistor 5 having resistance out of range (open or shorted) or a fault in the wiring harness between Thermistor 5 and PBA.
How to fix it
This one needs a professional technician to diagnose and replace the faulty sensor.
SourceSamsung service manual / Customer Repair Guide