DISPLAY BLINKS "4"

Hello
See links below on parts breakdown & service data sheet.
Matt Ace technician

Frigidaire Refrigerator Error Code = 4
Condition = Fridge and the control board goes through cycles but does not detect a damper connection
Repair or Check = Check air damper
Parts Needed = Air damper

Frigidaire Refrigerator Error Code = SY CE
Condition = Communications error at power up
Repair or Check = Check wiring between control board and user interface
Parts Needed = Control board or User interface

Frigidaire Refrigerator Error Code = 5Y EF
Condition = Evaporator fan circuit failure
Repair or Check = Check wiring between evaporator fan and control board
Parts Needed = Evaporator fan or control board

Frigidaire Refrigerator Error Code = EF
Condition = Evaporator fan circuit failure
Repair or Check = Check wiring between evaporator fan and control board
Parts Needed = Evaporator fan or control board

Frigidaire Refrigerator Error Code = dF
Condition = No defrost circuit
Repair or Check = Check wiring between defrost circuit and control board
Parts Needed = Main control board or Wiring harness