Error Code RD-HT
Fridge defrost heater not working
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: RD-HT LED blinks
What This Means
Heater connector loose; Heater element broken; Thermal fuse blown
What actually causes this:
Heater burned out or frost buildup in evaporator
First Thing to Check
Check for frost or ice on back wall of fridge
Parts Involved
How to Fix
- 1
After disconnecting CN20, measure resistance CN20-5 to CN20-7: 120 ohm ±7%
- 2
0 ohm = short, ∞ ohm = open
- 3
Power OFF before testing
This Error Applies To
Samsung RF28R7201 Series Refrigerators (2010) (2010–present)
Related Error Codes
Fridge cooling fan malfunction
Flex zone temperature control heater failure
Ice room fan not operating
Ice maker not making ice
Main board input/output chip failure
Dispenser display not communicating
Compressor control board communication failed
Ice storage compartment heater failure