Samsung · Refrigerator Moderate
PC ER — Communication Error Between Boards
The main control board has lost communication with the door panel or sub-PCB. Almost always caused by a loose door wiring harness — frequently after the door has been removed for delivery, or following a power surge.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Easy
- Verified against
- samsung.com ↗
How to fix it
- Unplug the refrigerator for 5-10 minutes, then plug back in.
- If PC ER persists, pop the top hinge cover and check the multi-pin connector(s) routing from the cabinet into the door — reseat firmly.
- Inspect wires for pinching or damage at the hinge.
- If reseating doesn't help, isolate by swapping or testing the door sub-PCB.
- Replace the main PCB as a last resort.
Why it happens
Typical signs: PC ER on display · Touch panel unresponsive · Display flickers or partially lit · Started after move-in / delivery
- Loose door harness connector Multi-pin connector at the top hinge area not fully seated.
- Power surge corrupted communication Boards lost sync — usually a power-cycle fixes it.
- Damaged harness Wires pinched at the hinge during reinstallation.
- Failed sub-PCB in the door Less common; replace door display board.
More Samsung refrigerator codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: samsung.com.