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Kenmore Refrigerator Er CO Error Code — Control Board Communication Fault

Kenmore Refrigerator Error Code Reference

Er CO

Kenmore Refrigerator Er CO Error Code — Control Board Communication Fault

Kenmore Refrigerator

High Severity
Warning: If your Kenmore appliance displays the Er CO error code and you are unsure how to proceed, turn off the appliance and contact a qualified technician. Some errors require professional repair to avoid further damage or safety risks.

The Er CO error code on a Kenmore refrigerator indicates a communication error between the main control board and one or more sub-controllers (display board, inverter board, or secondary control module). This is a critical error that may cause the refrigerator to operate incorrectly or stop functioning.

Causes

  • Loose or damaged communication harness connectors
  • Failed main control board
  • Failed display or secondary control board
  • Power supply issues affecting board communication

Troubleshooting

  1. Unplug the refrigerator for 5 minutes to reset the boards.
  2. If Er CO returns, professional diagnosis of the control board communication circuit is required.

Control board communication errors require advanced diagnostic tools to identify which board has failed. Our certified technicians are equipped to diagnose and repair Er CO errors accurately, replacing only the failed component.

Need Professional Help with Error Code Er CO?

Our highly trained Kenmore technicians can diagnose and fix this error code quickly — using factory-certified parts and a 30-day warranty.

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