Error code
-15°C LED LAMP
Meaning
Defrost cycle cannot be properly detected or controlled
Critical
What to do
Why this happens
The issue may be attributed to connector pin degradation, short circuit in sensor wiring, defrosting temperature sensor malfunction, or a poor open circuit connection.
How to fix it
Replace defrosting sensor and verify resistance matches specification (5.39-5.49 Kohm)
SourceSamsung service manual