Error Code 12C
The fridge temperature sensor isn't reading correctly
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 12C
What This Means
Sensor housing separated from compartment; Incomplete contact at sensor connector; Open-circuited wire in sensor circuit; Short-circuit in sensor wiring; Defective thermistor NTC
What actually causes this:
The fridge temperature sensor came loose or has a broken wire
First Thing to Check
Open the fridge compartment and look for a loose wire or sensor tab on the wall
Parts Involved
How to Fix
- 1
1. Measure voltage between Main PCB CN20 pins 9 and 11
- 2
2. Voltage should be within 4.5V to 1.0V range for normal operation
- 3
3. Check sensor connector for loose or corroded pins
- 4
4. Inspect sensor wiring for damage or separation
- 5
5. If voltage is out of range, test thermistor resistance against temperature table
- 6
6. Check for open or short circuits in wiring harness
Other Error Codes for RF23DB9750
The proximity sensor hardware is broken
The freezer temperature sensor isn't reading correctly
The humidity sensor isn't working properly
The Cool Select room temperature sensor is malfunctioning
The Cool Select room fan isn't working properly
The ice maker temperature sensor isn't working
The cubed ice maker has failed multiple times
The fridge fan motor isn't spinning or isn't being detected