Error Code 2
Freezer defrost temperature sensor malfunction detected
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 4-5
What This Means
Open circuit in sensor; Short circuit in sensor; Connector separation or poor contact; Defrost heater housing separation
What actually causes this:
Sensor became disconnected from freezer area or internal circuit failed
First Thing to Check
Look for loose wires where defrost heater connects
Parts Involved
How to Fix
- 1
Check voltage between MAIN PCB CN31 #7 and #8 should be 4.5V to 1.0V
- 2
Measure defrost sensor resistance - 0Ω indicates short, ∞Ω indicates open
- 3
Verify connector CN31 is fully seated
- 4
Check defrost heater continuity and resistance
This Error Applies To
Samsung RR39M73 Series Refrigerators
Related Error Codes
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Freezer defrost cycle cannot complete properly
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Condenser fan motor not operating when required