Error code
1°C LED LAMP
Meaning
Freezer cooling fan is not working or is stuck
Critical
What to do
Why this happens
Possible causes include a fault in the fan motor signal line, a broken circuit within the fan motor, the fan motor being stuck or jammed, loss of feedback signal from the fan motor, or a loose connector on the fan motor.
How to fix it
Clear any ice or debris blocking fan; replace motor if it still doesn't spin freely
SourceSamsung service manual