Error Code 46E
Internal I/O expander chip on Main PCB has lost communication
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 46E
What This Means
I/O Expander chip failure on Main PCB; Communication bus fault; Main PCB defect
What actually causes this:
A component on the Main PCB has failed, specifically the I/O expander IC.
First Thing to Check
Power cycle the refrigerator — if the error returns immediately, the Main PCB requires replacement.
Parts Involved
How to Fix
- 1
Check all connectors to the Main PCB
- 2
Replace the Main PCB
Other Error Codes for RF23CB9900QKAA
Door showcase heater has an open or short circuit fault
Ice Bites ice maker temperature sensor reading invalid
Ambient air temperature sensor reading invalid
Freezer defrost sensor reading out of valid range
Freezer evaporator fan not running or not sending feedback signal
Flex Crisper compartment sensor out of valid range
Fridge compartment defrost sensor reading out of valid range
Fridge evaporator fan not running or not sending feedback