Error Code RD
Refrigerator defrost heater circuit is broken
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: Refrigerator Defrost LED blinks
What This Means
Sensor wire disconnected from CN20; Heater element short circuit; Bimetal thermostat failed; Open wire connection
What actually causes this:
Defrost heater element burned out or thermostat stuck open
First Thing to Check
Unplug and check if CN20-5 and CN20-7 wires are firmly connected
Parts Involved
How to Fix
- 1
1. Disconnect MAIN PCB CN20 from board
- 2
2. Measure resistance between CN20-5 and CN20-7
- 3
3. Should read 120 ohms ±7% for refrigerator defrost heater
- 4
4. 0 ohm indicates short, infinity indicates open circuit
This Error Applies To
Samsung RF22R7351 Series Refrigerators (2010) (2010–present)
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