Samsung Refrigerators2010–present
Error Code IO-EXP
Main board input/output chip failure
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: IO-EXP LED blinks
What This Means
IO expander chip failure; Solder joint crack; PCB damage
What actually causes this:
Main circuit board chip or solder joint failed
First Thing to Check
Check for visible damage or burn marks on main board
Parts Involved
Main PCB Board Assembly
How to Fix
- 1
Inspect main PCB for damaged chips
- 2
Check solder joints under IO expander
- 3
Replace main PBA if damaged
This Error Applies To
Samsung RF28R7201 Series Refrigerators (2010) (2010–present)
Service manual exact match: RF28R7201AAService manual exact match: RF28R7201SA
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