GE Refrigerator Error Code Er CO

Er CO on a GE refrigerator indicates a communication error between the main PCB's MICOM and the display MICOM. The two control modules have lost their data connection, which is needed for the refrigerator to operate and display information correctly. The fault is caused by either a loose or faulty wiring connection or a failure in the transmitter/receiver circuitry on one of the boards.

A power reset, such as unplugging the refrigerator for a few minutes, may temporarily clear Er CO if the fault was caused by a momentary signal disruption. However, if the underlying cause is a loose connector or a failing PCB component, the error will return. A proper repair requires identifying and fixing the root cause of the communication failure.

If the fix is simply reseating a loose connector, there may be little to no parts cost, though a service call fee typically ranges from $75 to $150. If a display PCB or main PCB replacement is needed, parts alone can range from $100 to $350 or more depending on the model, with total repair costs including labor often falling between $200 and $500.

A homeowner comfortable with basic appliance repair can start by checking for loose wire connectors between the display panel and the main control board, particularly at CON101 on the display PCB. If reconnecting the wiring does not resolve the issue, testing voltage at that connector and replacing a control board are tasks better suited to a technician with electrical diagnostic experience.

An Er CO error means the main control board and display are not communicating properly, which can affect the refrigerator's ability to regulate temperature correctly. It is advisable to check food temperatures and address the error promptly rather than relying on the unit to maintain safe storage conditions while the fault is active.