How do I fix error code 4 on my Samsung RF262BEAESG?

1. undefined: Check voltage between Main PCB CN20-6 and CN20-8 should be 4.5V~1.0V 2. undefined: Verify connector is fully inserted 3. undefined: Measure sensor resistance at defrost temperature

Samsung RF262BEAESGRefrigerator

Error Code 4

Q: What does error code 4 mean on a Samsung RF262BEAESG?

Freezer defrost cycle sensor not responding Loose connector at CN20-6 and CN20-8; Defective freezer defrost thermistor; Bad PCB connection

Freezer defrost cycle sensor not responding

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: Error 4

What This Means

Loose connector at CN20-6 and CN20-8; Defective freezer defrost thermistor; Bad PCB connection

What actually causes this:

Sensor wire disconnected or sensor damaged

First Thing to Check

Verify defrost heater connector is properly seated

Parts Involved

Thermistor (F-DEF) 502ATMain PCB CN20

How to Fix

1
Check voltage between Main PCB CN20-6 and CN20-8 should be 4.5V~1.0V
2
Verify connector is fully inserted
3
Measure sensor resistance at defrost temperature

Other Error Codes for RF262BEAESG

Freezer is too warm

Ice maker temperature sensor not responding

Compressor fan not running

Pantry damper heater not heating

Input/output expander chip not responding

Compressor drawing too much current

Inverter power module failure

Fridge defrost cycle sensor not responding

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