What does error code MAIN-PANEL-COMM-ERROR mean on a Samsung refrigerators?

Control panel and main computer board have lost communication Loose or damaged wiring harness between main PCB and panel; Failed Panel PCB; Failed Main PCB

How do I fix error code MAIN-PANEL-COMM-ERROR on a Samsung refrigerators?

1. undefined: Check all wiring connections between the display panel and Main PCB 2. undefined: Power cycle the refrigerator 3. undefined: Check connector CN40 on Main PCB is fully seated 4. undefined: Replace Panel PCB first as it is the more likely failure point

Samsung Refrigerators2022–present

Error Code MAIN-PANEL-COMM-ERROR

Control panel and main computer board have lost communication

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: Specific LED blink pattern via self-diagnosis

What This Means

Loose or damaged wiring harness between main PCB and panel; Failed Panel PCB; Failed Main PCB

What actually causes this:

The display panel and the main control board can no longer talk to each other, so the fridge cannot be controlled or display temperatures.

First Thing to Check

Unplug the fridge for 5 minutes and plug it back in to see if the error clears on its own.

Parts Involved

Panel PCB (Display PCB)Main PCBWiring harness CN40

How to Fix

1
Check all wiring connections between the display panel and Main PCB
2
Power cycle the refrigerator
3
Check connector CN40 on Main PCB is fully seated
4
Replace Panel PCB first as it is the more likely failure point

This Error Applies To

Samsung RF25C5 Series Refrigerators (2022) (2022–present)

Service manual exact match: RF25C5151SR/AAService manual exact match: RF25C5151**Service manual exact match: RF25C5551**Service manual exact match: RF25C5551SR/AA