Written by
Elena Marsh Appliance Care EditorPublished October 29, 2026
VERIFIED
Error codeEr CO
ApplianceRefrigerator
Er CO is shown by Kenmore bottom-freezer refrigerators with a 795 model prefix when the main board and the display board fail to exchange signals.
Parts the manual names
Display control board
Power control board
Wiring harness
Owner role
The manual has no do-it-yourself routine for Er CO. Unplug the refrigerator if it must be shifted, and let a technician deal with the boards and harness.
Related codes
Er CF: the condenser fan motor, which also lists the power control board.
Er CO needs a technician to look at the board link. Read up on Kenmore refrigerator repair and phone (415) 825-6393; the code and model number are the two details to quote.
Model compatibility: Kenmore reuses codes across series and model years, so Er CO may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
There is a communication error between the main board and the display board.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Kenmore appliance?
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