Error code
R-TEMP-HIGH
Meaning
Refrigerator compartment temperature has risen to an unsafe level
Moderate
What to do
Why this happens
Possible causes include an extended period with the fridge door left open, hot food placed inside, a damper failure to admit cold air, or a cooling system issue.
How to fix it
Close the door; if temperature does not recover, have the damper and cooling system inspected.
SourceSamsung service manual