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
This Error Applies To
Samsung RF22K9581 Series Refrigerators (2016) (2016–present)
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