Error Code 46C
I/O Expander is not responding to main board
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 46C
What This Means
I/O Expander failure; Main PCB malfunction; Cable connection problem
What actually causes this:
Main PCB failure or communication line break
First Thing to Check
Check if all connectors to main PCB are attached
Parts Involved
How to Fix
- 1
Check I/O Expander connector
- 2
Verify cable connections
- 3
Test I/O communication signals
This Error Applies To
Samsung RF28K9070A Series Refrigerators (2018) (2018–present)
Related Error Codes
Fridge fan motor is not operating
Cool Select fan motor is not running
Freezer fan motor is not working
Main and panel boards are not communicating
Compressor inverter is not communicating with main board
Fridge defrost sensor is not working
Freezer defrost sensor is not responding
Ice duct heater not working properly