Samsung RH29H9000SRRefrigerator
Error Code 46Er
I/O expander chip on main board has a communication fault
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 46Er on panel
What This Means
Defective main PCB; I/O expander circuit failure on main PCB
What actually causes this:
Internal failure of the I/O expander IC on the main PCB.
First Thing to Check
Power cycle the unit by unplugging for 5 minutes and plugging back in.
Parts Involved
Main PCB
How to Fix
- 1
Confirm wiring to main PCB is intact
- 2
Replace main PCB
Other Error Codes for RH29H9000SR
PC-Er / PC-Ch
Display panel and main control board cannot communicate
44Er
Main control board and inverter board cannot communicate
oP-Er / oP-Ch
There is a configuration mismatch between the panel and main boards
O-FF
Refrigerator is in Cooling Off mode — not cooling
FF
Unit is in forced manual operation / cooling test mode
Fd
Unit is in forced defrost mode