When a residential oven powers on and heats up but fails to reach or maintain your programmed cooking temperature, the malfunction is typically caused by a failing temperature sensor probe, a miscalibrated control board, a weak gas igniter on gas ranges, or a partially failing electric heating element. If the sensor probe is coated in grease or out of alignment, it sends incorrect resistance values to the computer. You can troubleshoot temperature accuracy easily using an independent oven thermometer. You can verify that your corrective action is successful when cleaning the sensor probe, recalibrating the control settings, or replacing a faulty temperature sensor allows the oven to reach and hold precise baking temperatures.
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