How do I fix error code 46Er on my Samsung RS27T5561?

1. undefined: Check communication cable to I/O Expander 2. undefined: Verify I/O Expander chip is powered 3. undefined: Inspect connector pins for damage 4. undefined: Test cable continuity 5. undefined: Check for visible damage to I/O Expander IC

Samsung RS27T5561Refrigerator

Error Code 46Er

Q: What does error code 46Er mean on a Samsung RS27T5561?

Input/Output expansion chip not responding to main board I/O Expander to Main communication line issue; I/O Expander chip failure; Main PCB MICOM failure; Loose or damaged communication cable; I/O Expander power supply failure

Input/Output expansion chip not responding to main board

Moderate

Address soon - your appliance may not work properly

Also displayed as: 46Er on panel

What This Means

I/O Expander to Main communication line issue; I/O Expander chip failure; Main PCB MICOM failure; Loose or damaged communication cable; I/O Expander power supply failure

What actually causes this:

I/O chip failed or main board lost communication with it, breaking control of door sensors or relays