Kenmore Range Error Code 1d12

Error code 1d12 on a Kenmore range indicates that the lower oven temperature sensor is reading a resistance value above 2237 ohms at the moment the oven door unlocks, which is outside the acceptable operating range. The control board interprets this elevated resistance as a sensor fault and responds by disabling all cooking functions for the lower oven cavity as a safety measure. The temperature sensor, also called an RTD (resistance temperature detector) or oven probe, is a thermistor-type component whose resistance changes predictably with temperature. At a standard room temperature of approximately 75 degrees Fahrenheit, a properly functioning sensor should measure close to 1000 ohms.

When resistance climbs above the fault threshold, it typically points to one of three root causes: a failed sensor, a wiring problem between the sensor and the control board, or a loose or corroded connector. Resistance that reads too high generally indicates an open or near-open circuit rather than a short. This can result from a broken sensor element, a wire that has been pinched or burned through, or a connector terminal that has backed out or corroded, all of which interrupt or degrade the signal path back to the control board.

Diagnosing this fault requires a digital multimeter. The first step is to disconnect power, access the sensor at the back wall of the lower oven cavity, and measure resistance directly at the sensor terminals. A reading near 1000 ohms at room temperature confirms a healthy sensor. If the sensor reads significantly above that value or shows an open circuit (OL), the sensor itself is likely defective. If the sensor reads correctly at its terminals but the fault persists, the wiring harness between the sensor and the control board should be inspected for damage or high-resistance connections.