Error Code 24E
Freezer failed to complete defrost cycle in 120 minutes
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 24E
What This Means
Freezer defrost heater housing connector separated or contact error; Defrost heater open circuit; Thermal fuse (110°C, 250V/10A) blown; Bimetal thermostat (BT-121-M) not resetting; Short-circuited heater (0 Ohm)
What actually causes this:
The defrost heater in the freezer coils did not melt the ice buildup — either the heater burned out, a thermal fuse blew, or a wiring connection came loose.
First Thing to Check
Run a forced defrost cycle and feel the back wall of the freezer after 10 minutes — if it stays ice-cold, the heater is likely not energizing.
Parts Involved
How to Fix
- 1
Enter forced defrost mode (test mode → Fd) and verify heater energizes
- 2
Separate Main PCB CN70 and CN70_1 wires from PCB
- 3
Measure resistance between CN70 pin 1 and CN70_1 pin 3: 0 Ohm = heater shorted; ∞ Ohm = heater or fuse open
- 4
Check thermal fuse continuity (cuts at 110°C)
- 5
Check bimetal continuity (opens at 60°C, closes at 40°C)
- 6
Verify defrost sensor voltage is 3.1V or higher (sensor below -5°C threshold)
This Error Applies To
Samsung RF23 Series Refrigerators (2023) (2023–present)
Related Error Codes
Freezer defrost sensor has an open or short circuit
Fridge compartment temperature sensor is faulty or disconnected
Fridge defrost sensor is open or shorted
Freezer temperature sensor has failed or lost connection
Ambient temperature sensor has failed or is disconnected
Freezer fan motor stopped or lost feedback signal
Cool Select Room fan has stopped or lost feedback
Internal board communication chip has failed