Kenmore Refrigerator Error Code Freezer Sensor

The Freezer Sensor error on a Kenmore refrigerator indicates that the main PCB has detected an abnormal signal from the freezer temperature sensor. This sensor is a thermistor, a resistive device that changes its electrical resistance in response to temperature changes. The control board continuously monitors the resistance value reported by this thermistor to regulate compressor cycles and maintain the correct freezer temperature. When the board detects a reading that falls outside the expected resistance range, either because the circuit is open (cut wire) or shorted to ground or another circuit, it logs this fault code and may disable normal temperature control functions.

The two primary electrical faults that trigger this code are an open circuit and a short circuit. An open circuit occurs when a wire is physically cut, broken, or has a severely corroded connector that interrupts current flow entirely. A short circuit occurs when the sensor wiring contacts another conductor, causing resistance to drop abnormally low. Both conditions produce sensor readings that the PCB recognizes as invalid. The first diagnostic step is to inspect connector CON6 on the main PCB, as a loose or poorly seated connection at this point can mimic both fault types without any actual wire damage.

If CON6 is secure and undamaged, the next focus shifts to the freezer thermistor itself and the wiring harness running from it to the board. The harness is routed through the refrigerator cabinet and can be pinched, chafed, or damaged by ice buildup over time. A failed thermistor that has drifted to an extreme resistance value, or one that has developed an internal open, will also produce this error. Replacing a faulty sensor or repairing damaged wiring typically resolves the fault.