Error Code 09
The thermistor that terminates the freezer defrost cycle is open or shorted
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: Left - ③ LED ON
What This Means
Connector missing or slipped out; Contact failure on connector; Wire cut or damaged; Short circuit condition; Defrost sensor thermistor failure; Freezer evaporator ice buildup preventing sensor function
What actually causes this:
Thermistor failed at evaporator or wire damaged during evaporator removal
First Thing to Check
Check CN30 #4 to #7 voltage (1.0V~4.5V expected)
Parts Involved
How to Fix
- 1
Check voltage between MAIN PCB CN30 #4 and #7
- 2
Voltage should be within range of 4.5V to 1.0V
- 3
Verify connector CN30 is fully seated
- 4
Inspect freezer evaporator for excessive ice
This Error Applies To
Samsung RS25J5008S Series Refrigerators (2014) (2014–present)
Related Error Codes
Ice maker has failed its automatic cycle three times in a row
Serial communication between main controller and display panel has been lost
Freezer compartment thermistor is open or shorted
The damper air-door heater circuit is open — refrigerator temperature control may be affected
Ice maker temperature sensor open/short or disconnected
Inverter-driven compressor cannot start or is being protected from abnormal electrical condition
Ambient temperature sensor open or shorted — affects defrost timing and efficiency
Refrigerator compartment thermistor open or shorted