Samsung RF28R7201AARefrigerator
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
Other Error Codes for RF28R7201AA
IM-FUNC
Ice maker not making ice
DISP-PANEL
Dispenser display not communicating
MAIN-INV
Compressor control board communication failed
ICE-ROOM-HT
Ice storage compartment heater failure
F
Freezer temperature sensor not working
RF
Fridge cooling fan malfunction
FZ-DMH
Flex zone temperature control heater failure
IR-FAN
Ice room fan not operating