Error Code PC-Er / PC-Ch
Display panel and main control board cannot communicate
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: PC-Er or PC-Ch alternating on panel
What This Means
Wiring harness issue between panel and main PCB; Defective panel PCB; Defective main PCB; Loose connector at upper hinge or door panel
What actually causes this:
A loose wiring harness at the upper hinge, or a failed panel or main PCB communication circuit.
First Thing to Check
Check and firmly reseat the connector at the freezer upper hinge cover — this is the most common cause.
Parts Involved
How to Fix
- 1
Check harness from panel to main PCB for shorts or opens
- 2
Check connector at freezer upper hinge cover is properly inserted
- 3
Confirm CN50 connector at main PCB is seated
- 4
Use oscilloscope to verify communication signal if harness checks out
- 5
Replace main and panel PCB if no wiring issue found
Other Error Codes for RH29H9000SR
I/O expander chip on main board has a communication fault
Main control board and inverter board cannot communicate
There is a configuration mismatch between the panel and main boards
Refrigerator is in Cooling Off mode — not cooling
Unit is in forced manual operation / cooling test mode
Unit is in forced defrost mode