Error Code F DEF ERROR

Freezer is not defrosting automatically and ice may build up

Also displayed as: F DEF ERROR

What This Means

Heater resistance not within 63 ohm ±7% range; Defrost heater shorted (0 ohm reading); Defrost heater open circuit (infinite ohm); Bimetal or heater wire disconnection; Bad solder connection on heater terminals; Defrost sensor temperature above 53.6F (12C)

First Thing to Check

Parts Involved

How to Fix

1. 1

   1. Enter manual defrost mode (press Freezer+Control Lock for 8 seconds)

2. 2

   2. Measure resistance between CN31-3 and CN31-4 (should be 63 ohm ±7%)

3. 3

   3. Check defrost sensor temperature is below 53.6F (12C)

4. 4

   4. Verify heater resistance between CN70-5 and CN71-5 (63 ohm ±7%)

5. 5

   5. Measure power applied to defrost heater terminals

6. 6

   6. Verify system returns to cooling after defrost cycle completes

This Error Applies To

Samsung DRF36C100SR Series Refrigerators (2017) (2017–present)