Samsung RF28R7201SARefrigerator
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
Refrigerator Defrost Heater (120W)
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
Other Error Codes for RF28R7201SA
IM-FUNC
Ice maker not making ice
IO-EXP
Main board input/output chip failure
DISP-PANEL
Dispenser display not communicating
MAIN-INV
Compressor control board communication failed
ICE-ROOM-HT
Ice storage compartment heater failure
F
Freezer temperature sensor not working
RF
Fridge cooling fan malfunction
FZ-DMH
Flex zone temperature control heater failure