PC ER Moderate Easy DIY

Samsung Refrigerator PC ER — Communication Error Between Boards

Samsung Refrigerator · Error code PC ER

What PC ER Means

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.

Symptoms

  • PC ER on display
  • Touch panel unresponsive
  • Display flickers or partially lit
  • Started after move-in / delivery

Common Causes

1
Loose door harness connector

Multi-pin connector at the top hinge area not fully seated.

2
Power surge corrupted communication

Boards lost sync — usually a power-cycle fixes it.

3
Damaged harness

Wires pinched at the hinge during reinstallation.

4
Failed sub-PCB in the door

Less common; replace door display board.

How to Fix It

  1. Unplug the refrigerator for 5-10 minutes, then plug back in.
  2. 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.
  3. Inspect wires for pinching or damage at the hinge.
  4. If reseating doesn't help, isolate by swapping or testing the door sub-PCB.
  5. Replace the main PCB as a last resort.

More Samsung Refrigerator Codes

21E 21E / 21C — Freezer Fan Fault 22 C 22 C — Fridge Fan Open Circuit 22E 22E / 22C — Fridge Fan Fault 33 E 33 E — Ice Pipe Heater Error 39 C 39 C — Ice Maker Communication / Sensor Error 39 E 39 E — Ice Maker Function Error

All Samsung codes → All refrigerator codes →

Verified against manufacturer documentation: samsung.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.