What does error code 46Er mean on a Samsung refrigerators?

I/O expander chip on main board has a communication fault Defective main PCB; I/O expander circuit failure on main PCB

How do I fix error code 46Er on a Samsung refrigerators?

1. undefined: Confirm wiring to main PCB is intact 2. undefined: Replace main PCB

Samsung Refrigerators2018–present

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

This Error Applies To

Samsung RH22H9010S Series Refrigerators (2018) (2018–present)

Service manual exact match: RH22H9010SR/AAService manual exact match: RH29H90**Service manual exact match: RH29H9000SR/AAService manual exact match: RH22H90**

Related Error Codes

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

Unit is in forced manual operation / cooling test mode

Unit is in forced defrost mode

Need more help with your Samsung refrigerators?