Kenmore Refrigerator Error Code CO E

CO E stands for a communication error between the display PCB and the main control PCB. These two boards must exchange data continuously for the refrigerator to operate correctly. When that communication link fails or is interrupted, the CO E code appears. Common causes include a loose connector at CON101 or a wiring issue between the two boards.

A CO E error means the display and main control boards are not communicating properly, which can affect the refrigerator's ability to regulate temperature and manage its systems. It is not advisable to rely on the appliance for food safety until the error is diagnosed and resolved. Check the internal temperature with a thermometer if you need to assess food safety in the short term.

Repair costs vary depending on the root cause. If only a connector needs reseating, the repair may cost nothing beyond your time. A wiring harness repair or replacement could range from around $50 to $150 in parts. Replacing a display PCB or main control PCB typically runs between $100 and $350 per board depending on the specific model, plus labor costs if a technician performs the work.

In some cases, yes. Start by locating connector CON101 on the display PCB and firmly reseating it, as a loose connection is the most common cause. You can also check the voltage between the red and blue wires at that connector, which should read 12V DC. If reseating the connector does not resolve the issue and voltage is absent or incorrect, further diagnosis or board replacement is typically needed and may require a technician.

A power reset, such as unplugging the refrigerator for a few minutes and plugging it back in, may temporarily clear the code if the communication fault was caused by a transient glitch. However, if there is an underlying issue such as a loose connector, wiring fault, or failed PCB, the CO E error will return. A reset is worth trying first, but it is not a substitute for proper diagnosis.