Error Code 77E
The heater that prevents condensation on the showcase door panel has an open circuit
Moderate
Address soon - your appliance may not work properly
Also displayed as: 77E
What This Means
Showcase heater housing connector separation; Contact error; Disconnection in heater wire; Short circuit
What actually causes this:
Heater wire broken at the flex point near the door hinge from repeated door opening
First Thing to Check
Measure resistance at CN90 #1 and #5 with a multimeter; infinite resistance means an open circuit
Parts Involved
How to Fix
- 1
Measure resistance between Main PCB CN90 pins 1 and 5 — should be approximately 14 ohms
- 2
Inspect heater connector for looseness or damage
This Error Applies To
Samsung RF29A9071 Series Refrigerators (2021) (2021–present)
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