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Error Code

Kenmore Refrigerator Er CO Code Main to Display Board Communication

Plain-language guidance for Kenmore code Er CO on Refrigerator — symptoms, safe checks, and when to call a technician.

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At a glance

Error code overview

A plain-language snapshot of Er CO for Kenmore Refrigerator — confirm the model series before you act.

Daniel Reeves Written by Daniel Reeves Appliance Repair Content Specialist Published October 20, 2026

Content status Verified

Error code Er CO
Appliance Refrigerator
Quick answer

Er CO on a 795-prefix Kenmore bottom-freezer refrigerator means the main board and display board are not communicating.

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

Communication error between main board and display board.

Er CO means the main board and the display board on a 795-prefix Kenmore bottom-freezer refrigerator are failing to communicate.

Parts involved

  • Display control board
  • Power control board
  • Wiring harness

What to expect

There is no do-it-yourself routine in the manual for this code. Unplug the refrigerator if you need to move it, and leave the boards and harness to a technician.

Compare with

Er CF (condenser fan motor) and Er FF (evaporator fan) sit on the same list of codes.

Kenmore refrigerator repair near you

Service covers the Miami, New York, Houston, Los Angeles and San Diego metro areas. Call (844) 747-3641 with the code Er CO, your model number and the steps you tried. More on refrigerator repair.

Source: Sears PartsDirect – Kenmore 795 model bottom-freezer refrigerator error codes

Caution

Safety warning

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.

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(844) 747-3641
Phone (844) 747-3641
Email info@kenmoreservicecenter.support
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