How to Fix Frigidaire Refrigerator Error ER CO

Error Code: ER CO Difficulty: Hard

Problem: Communication Error between Control Boards

How to Fix ER CO Error (Step-by-Step)

1. Unplug the refrigerator from the wall outlet to completely cut power.
2. Locate the main control board, typically behind a cover panel on the lower back of the unit. Also, locate the display board in the dispenser area on the door.
3. Carefully inspect the wire harness that runs between these two boards, often through the door hinge. Look for any visible signs of pinched, broken, or disconnected wires.
4. Firmly unplug and then reconnect the wire harness connectors at both the main board and the display board to ensure a solid connection.
5. If replacing the display board does not solve the issue, the final step is to replace the main control board.
6. When replacing a board, carefully transfer each wire connector from the old board to the exact same location on the new board one at a time to prevent errors.
7. Turn the appliance off, wait about 2 minutes, then turn it back on.

Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.

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