Signs Your Oven Temperature Sensor Is Bad
Updated 2026-08-14
An oven that bakes unevenly or seems to run hot or cold often has a failing temperature sensor rather than a heating element problem.
Common symptoms
Food consistently over- or under-baking despite correct settings, an oven that takes unusually long to preheat, or a temperature error code on the display are the classic signs.
A quick visual check
Open the oven and look at the sensor probe (a small metal rod usually near the back wall, separate from the heating elements) — if it's touching or very close to the cavity wall, it can give a false reading even when it's otherwise working fine.
How this differs from a heating element failure
A failed heating element usually means the oven won't heat at all, or heats very slowly with the element visibly not glowing. A bad sensor is different: the element still works and cycles on and off, but the temperature it settles at doesn't match what the display shows, since the board is reacting to a faulty reading rather than the actual cavity temperature.
Confirming the diagnosis
A technician can test the sensor's resistance with a multimeter and compare it against the manufacturer's expected range at room temperature — a reading well outside that range confirms the sensor has failed.
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