Error Code 24
Freezer defrost heater circuit has a fault
Moderate
Address soon - your appliance may not work properly
Also displayed as: LED 24 blink
What This Means
Wire harness connection fault on F-Defrost heater circuit; Defrost heater open circuit; Bimetal overheat protector open; Relay RY73 defect on main PCB
What actually causes this:
The freezer defrost heater or one of its linked heaters/bimetal is not working, so the freezer evaporator coil will ice over.
First Thing to Check
Initiate forced defrost mode and listen for the buzzer pattern — if the freezer does not warm up within a few minutes, the heater circuit is open.
Parts Involved
How to Fix
- 1
Check wire harness connections related to F-Defrost heater
- 2
Perform forced defrost (Fd mode) and verify heater activates
- 3
Test relay RY73 (Freezer Defrost relay) on main PCB
- 4
Since F-Defrost heater is linked with Drain Heater and Sub Heater, individual part diagnosis is not possible — check full harness
This Error Applies To
Samsung RS27FDBTNS Series Refrigerators (2016) (2016–present)
Related Error Codes
Fridge defrost sensor has failed or lost connection
Fridge cooling fan motor is not spinning or sending feedback
Freezer temperature sensor has failed or disconnected
Ambient room temperature sensor has failed or disconnected
Fridge temperature sensor has failed or disconnected
Ice maker temperature sensor has failed or disconnected
Main board and inverter compressor board have lost communication
Freezer defrost sensor has failed or lost connection