Error code
3°C LED LAMP
Meaning
Main cooling compressor is not running or malfunctioning
Critical
What to do
Why this happens
The issue may stem from an inability to start or operate the compressor due to an IPM fault in the Intelligent Power Module, detection of abnormal current by the compressor, errors in locating the compressor, or conditions such as motor restraint or a locked rotor.
How to fix it
This one needs a professional technician - requires electrical diagnostics and potential compressor replacement
SourceSamsung service manual