Error Code 39E
Freezer defrost heater or its safety fuse has failed
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 39E
What This Means
Defrost heater open-circuited; Temperature fuse blown; Bimetal thermostat defective; Heater wire short-circuited; Connector disconnected at CN70
What actually causes this:
The temperature fuse blows when the freezer overheats during defrost, or the heater element burns out after years of use.
First Thing to Check
Remove the freezer evaporator cover and visually inspect the defrost heater — check for visible burn marks or broken wire at the temperature fuse.
Parts Involved
How to Fix
- 1
Disconnect MAIN PCB CN70 wire and measure resistance between CN70 pin 7 and pin 1
- 2
0 Ohm reading indicates heater short circuit
- 3
Infinite (∞) Ohm reading indicates open wire or blown temperature fuse
- 4
Check bimetal thermostat continuity (Off: 140°F/60°C, On: 104°F/40°C)
- 5
Run forced defrost to confirm heater activation
This Error Applies To
Samsung RF32FM Series Refrigerators (2013) (2013–present)
Related Error Codes
Wall voltage too low for freezer compressor to run
Fridge compartment defrost sensor has failed or come loose
Freezer defrost sensor is failed or disconnected
Cool Select Room defrost sensor is failed or loose
Freezer temperature sensor is open, shorted, or disconnected
Outside air temperature sensor has failed or lost connection
Fridge section ice maker sensor is open, shorted, or out of range
Fridge fan motor stopped or lost feedback signal