Kenmore Refrigerator Error Code Room Temp Sensor

The Room Temp Sensor error on a Kenmore refrigerator indicates an abnormal condition with the room temperature sensor, which monitors the ambient temperature surrounding the unit. This sensor provides data the control board uses to adjust compressor and fan operation based on environmental conditions. When the control board detects a signal outside the expected parameters from this sensor, whether due to an open circuit, short circuit, or out-of-range resistance reading, it flags this secondary error code. In display check mode, this specific fault is identified by the Section A LED turning OFF, which distinguishes it from other sensor faults in the diagnostic sequence.

The first diagnostic step is to inspect the wiring harness connector designated CON5, which carries the signal between the room temperature sensor and the control board. Loose or corroded pins at CON5 are a frequent culprit, as vibration over time can cause connections to work themselves free. If the connection at CON5 is secure and shows no damage, the next focus shifts to the sensor itself. Room temperature sensors are typically negative temperature coefficient thermistors, meaning their resistance decreases as temperature rises. A failed sensor will often read an open circuit or a resistance value far outside the normal operating range for the ambient temperature present.

Beyond the connector and sensor, wiring damage along the harness between CON5 and the sensor can produce the same fault. Chafed insulation causing a short to ground, or a broken wire causing an open circuit, will both register as an abnormal sensor signal. The control board itself is a less common cause but should be considered if the wiring and sensor both test within acceptable parameters.