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

  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.

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

21E 21E / 21C — Freezer Fan Fault 22E 22E / 22C — Fridge Fan Error 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 40 E 40E — Ice Room Fan Error

All Samsung codes → All refrigerator codes →

Frequently asked questions

What does the PC ER code mean on a Samsung refrigerator?

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.

What causes the PC ER code on a Samsung refrigerator?

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.

Is it safe to keep using a Samsung refrigerator with a PC ER error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix PC ER on a Samsung refrigerator?

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.

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.