Kenmore Electric Oven Temperature Sensor – What It Does and How to Replace It

Understanding the Problem

What it is: The oven temperature sensor (sometimes called an oven thermistor or probe) tells the control board the actual oven cavity temperature so the control can cycle the heating elements and maintain a steady set temperature. A failing sensor will give incorrect readings (open, shorted, or out-of-range resistance), causing the oven to run too hot, too cold, cycle erratically, or show an oven error. Step-by-step diagnostic and repair steps: 1) Confirm the symptoms: Note whether the oven overheats, underheats, takes too long to reach set point, temperature swings wildly, or displays temperature-related error codes. Also check for uneven baking. 2) Visual inspection: Turn power off at the breaker. Open the oven and visually inspect the sensor (it’s mounted on the upper back wall of the bake cavity). Look for burn marks, breaks in the sensor probe, or damaged wiring/connectors. 3) Check wiring and connector: With power off, pull the sensor slightly out of the cavity (usually held by 1–2 screws) to access the connector at the rear. Make sure the connector pins are clean and not burned or corroded and that the wiring insulation is intact. 4) Multimeter resistance test (most reliable quick check): With power off and sensor disconnected from harness, set a multimeter to ohms. At room temperature a good oven sensor typically measures roughly 1,000–1,100 ohms (approx. 1kΩ) — exact spec varies by sensor, so consult your model manual. If you get OL (open), 0Ω (short), or a value far outside the expected range, the sensor is bad and should be replaced. 5) Live voltage/signal test (optional, advanced): With power on and oven calling for heat you can measure the sensor circuit voltage at the control or measure the change in resistance as oven warms (requires caution and experience). If wiring to the control reads normally but the sensor resistance does not change with temperature, replace the sensor. 6) Replace the sensor (if faulty): Tools: nut driver/Philips screwdriver, multimeter, new sensor. Turn power off at breaker. Remove oven racks. Unscrew the 1–2 screws holding the sensor in the back wall, gently pull the sensor through, disconnect the plug or unscrew the wire nuts, install the new sensor by connecting the plug/wires, push the sensor into place and secure with screws. Reinstall racks and restore power. 7) Test and calibrate: After replacement, preheat the oven and confirm temperature with an oven thermometer. If the oven still reads incorrectly by a consistent offset, use the oven’s calibration function (most Kenmore electronic controls allow ±35°F adjustment) to fine tune. If problems persist after a new sensor, inspect wiring and the control board for faults. Safety note: Always disconnect electrical power at the breaker before accessing internal oven components. If you are not comfortable working around live circuits, hire a qualified appliance technician.

Common Symptoms

Oven overheating or underheating, long preheat times, temperature swings while cooking, inaccurate oven temperature relative to setpoint, or oven temperature error codes.

Common Causes

• Failed/open or shorted oven temperature sensor (thermistor/probe)
• Damaged/loose wiring or corroded connector between sensor and control board
• Faulty oven control board (less common) producing incorrect readings despite a good sensor

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Frequently Asked Questions