Kenmore Refrigerator Error Code 3

Error code 3 on a Kenmore refrigerator indicates an abnormal condition with the primary refrigerator temperature sensor, known as Refrigerator Sensor 1. The main control board has detected either an open circuit (cut wire) or a short circuit in the sensor wiring, preventing it from reading the compartment temperature. The first place to check is the CON7 connector on the main PCB, as a loose connection there is the most common cause.

Error code 3 means the control board cannot accurately monitor the refrigerator compartment temperature, which can compromise its ability to maintain safe food storage temperatures. You should check whether the refrigerator is still cooling adequately and use a separate thermometer to verify the compartment temperature stays at or below 40 degrees Fahrenheit. It is best to address the error promptly rather than continue using the appliance in a fault condition.

A power reset may temporarily clear the error code display, but if the underlying fault in the sensor circuit has not been corrected, the code will return once the control board rechecks the sensor. A reset is useful for confirming whether the fault is intermittent, such as a loose connector, but it is not a substitute for diagnosing and repairing the root cause.

Yes, in many cases a DIYer can resolve this error by locating and firmly reseating the CON7 connector on the main control board, which requires no special tools or parts. If the connector is not the issue, a technician or experienced DIYer can use a multimeter to test the wiring harness and sensor for open or shorted circuits. Harness repairs and sensor replacements are moderate-difficulty repairs that require some comfort working with electrical components.

If reseating the CON7 connector resolves the fault, the repair costs nothing. A replacement refrigerator temperature sensor typically costs between $15 and $60 depending on the specific model. If a wiring harness replacement or a new main PCB is needed, total repair costs including labor can range from $100 to $400 or more.