Error Code 46c
The main control board cannot communicate with the I/O expansion module
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 46c
What This Means
I/O Expander communication cable disconnected; I/O Expander communication cable damaged; I/O Expander PCB defective; Main PCB defective; MICOM firmware issue
What actually causes this:
I/O expander cable is loose or the main control board has failed
First Thing to Check
Check that the I/O expander cable is firmly connected to both circuit boards
Parts Involved
How to Fix
- 1
1. Check communication cable between Main and I/O Expander
- 2
2. Inspect cable for damage or loose connections
- 3
3. Verify connector pins are clean and properly seated
- 4
4. Power cycle the refrigerator
- 5
5. If issue persists, replace Main PCB
This Error Applies To
Samsung DRF367500A Series Refrigerators (2017) (2017–present)
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