Error Code IO_EXPANDER_COMM_ERROR
An internal chip on the main control board has failed
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: Error indicated via LED
What This Means
Failed IO expander IC on Main PCB; PCB solder or trace defect
What actually causes this:
An input/output expansion chip on the main circuit board is not working, requiring board replacement.
First Thing to Check
Power-cycle the unit and re-run self-diagnostics to confirm the error persists.
Parts Involved
How to Fix
- 1
Confirm error via self-diagnosis
- 2
Replace Main PCB
Other Error Codes for RF23M8090SR
Refrigerator compartment defrost sensor is faulty
Compressor is getting too low a voltage to run
Freezer defrost sensor is faulty or not connected
Main board and compressor inverter board cannot communicate
Freezer temperature sensor is faulty or disconnected
Outside air temperature or humidity sensor is faulty
Ice storage room temperature sensor is faulty
Ice storage compartment fan is not working