Error Code IO
Control board IO expander chip is not working
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: IO LED blinks
What This Means
IO expander chip failure; Soldering defect on main PCB; Short circuit on PCB; Main board PCB failure
What actually causes this:
Main board chip failure or manufacturing defect
First Thing to Check
Unplug and inspect main PCB visually for burn marks or corrosion
Parts Involved
How to Fix
- 1
1. Visual inspection of main PCB around IO expander
- 2
2. Check for cold solder joints or corrosion
- 3
3. Check for short circuits on PCB
- 4
4. Use multimeter to test chip power pins
Other Error Codes for RF22R7351AA
Freezer temperature sensor is broken or disconnected
Outside temperature sensor is not working
Ice storage room temperature sensor is not working
Flex Zone damper heater circuit is broken
Refrigerator temperature sensor is broken or disconnected
Flex-Zone temperature sensor is broken or disconnected
Freezer fan motor is not running
Freezer defrost heater circuit is broken