Error Code 46
Control chip communication error on main board
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 46
What This Means
I/O Expander chip defective; Main PCB communication circuit defective; SDA/SCL signal line shorted or damaged; Pull-up resistors defective
What actually causes this:
Main board component failure or manufacturing defect
First Thing to Check
Power cycle refrigerator by unplugging for 5 minutes and plugging back in
Parts Involved
How to Fix
- 1
1. Check Main PCB for visible damage or burned components
- 2
2. Use oscilloscope to verify SDA and SCL signal lines
- 3
3. Check pull-up resistor values (typically 4.7kΩ) with multimeter
- 4
4. Measure voltage on SDA/SCL lines — should be high (~3.3V) at idle
- 5
5. If pull-ups are correct but no signals, replace Main PCB
Other Error Codes for RF28K9580
Freezer defrost sensor is not working
Freezer temperature sensor is not working
Outside temperature sensor is not working
Ice maker temperature sensor is not working
Refrigerator fan is not working
Convertible zone defrost system secondary error
Refrigerator compartment temperature sensor is not working
Convertible zone temperature sensor is not working