What does error code IO_EXPANDER_COMM mean on a Samsung refrigerators?

Internal IO expander chip on main board has failed MAIN PCB internal IC failure; Soldering defect on MAIN PCB

Samsung Refrigerators2023–present

Error Code IO_EXPANDER_COMM

Internal IO expander chip on main board has failed

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: Blinks on display

What This Means

MAIN PCB internal IC failure; Soldering defect on MAIN PCB

What actually causes this:

An internal chip on the main circuit board used to manage multiple inputs and outputs has stopped communicating.

First Thing to Check

Power cycle the unit once. If the error returns immediately, the main PCB needs replacement.

Parts Involved

MAIN PCB

How to Fix

1
Replace MAIN PCB

This Error Applies To

Samsung RF23BB89 Series Refrigerators (2023) (2023–present)

Service manual exact match: RF29BB89***Service manual exact match: RF24BB66***Service manual exact match: RF30BB62***Service manual exact match: RF29BB82***Service manual exact match: RF30BB69***Service manual exact match: DRF36C300**Service manual exact match: RF24BB69***Service manual exact match: RF30BB66***+2 more