What does error code MAIN_PANEL_COMM_ERROR mean on a Samsung refrigerators?

The main control board and the display panel are not communicating Loose or damaged wiring harness between panel PCB and Main PCB; Failed Main PCB; Failed Panel PCB

How do I fix error code MAIN_PANEL_COMM_ERROR on a Samsung refrigerators?

1. undefined: Display shows 'Pc - Ch' alternating 2. undefined: Check wiring harness between panel and main PCB for damage or loose connector 3. undefined: Use oscilloscope to confirm communication signal on cable 4. undefined: If cable is good, replace Main PCB first, then Panel PCB if still failing

Samsung Refrigerators2017–present

Error Code MAIN_PANEL_COMM_ERROR

The main control board and the display panel are not communicating

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: Pc - Ch blinks on panel (0.5s ON / 0.5s OFF)

What This Means

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

What actually causes this:

The communication wire between the main board (in the back) and the display panel (on the door) is damaged or a board has failed.

First Thing to Check

Open and close the fridge door a few times — sometimes the wire that runs through the door hinge can get pinched.

Parts Involved

Main PCBPanel PCBCommunication wiring harness

How to Fix

1
Display shows 'Pc - Ch' alternating
2
Check wiring harness between panel and main PCB for damage or loose connector
3
Use oscilloscope to confirm communication signal on cable
4
If cable is good, replace Main PCB first, then Panel PCB if still failing

This Error Applies To

Samsung RF23M80 Series Refrigerators (2017) (2017–present)

Service manual exact match: RF23M80*0**Service manual exact match: RF23M8090SR/AAService manual exact match: RF23M8070SR/AAService manual exact match: RF23M8070SG/AAService manual exact match: RF23M8090SG/SAService manual exact match: RF23M8080SR/EE