Kenmore Refrigerator Error Code E CO

E CO indicates a communication error between the Main PCB and the Display PCB. These two control boards exchange data constantly to run the refrigerator, and when that link fails, the unit displays E CO to signal the breakdown. The most common causes are loose wiring connectors or damaged wiring near the door hinge.

An E CO error means the control boards are not communicating properly, so temperature control and other functions may not operate reliably. It is generally not advisable to trust the refrigerator to maintain safe food temperatures while this code is active. The issue should be diagnosed and resolved before storing perishable food.

Repair costs vary widely depending on the root cause. If the fix is simply reseating a loose connector, you may only pay for a service call, typically in the range of $75 to $150. Replacing a Display PCB or Main PCB generally adds parts costs on top of labor, with total repair bills often falling somewhere between $150 and $400 or more depending on parts pricing and local labor rates.

A homeowner comfortable with basic appliance inspection can start by checking that all visible wiring connectors are firmly seated, particularly near the door hinge area where wiring is prone to wear. However, measuring voltage at CON101 and diagnosing board-level faults requires a multimeter and some technical experience. If the wiring looks intact and the error persists, a qualified technician should evaluate the control boards.

A power reset, done by unplugging the refrigerator for several minutes and then plugging it back in, can sometimes clear a temporary communication glitch. If the error returns after the reset, the underlying cause, such as a loose connector, damaged wire, or faulty board, has not been resolved and needs further diagnosis.