An oven that runs cooler or hotter than its display is a common complaint, and the first step is to measure before you assume a repair is needed. A cheap oven thermometer set on the middle shelf shows how far the oven is off.
Run a simple test
- Set a stand-alone thermometer in the center of the oven.
- Preheat to 350 degrees and wait for the oven to signal it is ready.
- Wait 15 more minutes, then read the thermometer.
Reading the result
- A difference of a few degrees is normal; ovens cycle above and below the set point.
- A large and steady gap suggests the oven sensor or its calibration.
- A temperature that rises slowly or never reaches the target points to a bake element or, on gas, the igniter and gas supply.
Electric ranges
Look at the bake element at the bottom of the oven. Cracks, blisters or a section that does not glow red suggest it has failed. A tripped breaker can leave the oven lit but without heat if only one leg is down.
Gas ranges
A gas oven takes a few minutes for the igniter to open the valve. If the igniter glows but the burner never lights, it is weak and will not draw enough current. If you smell gas, turn the oven off and ventilate the room.
What the sign does not show
A cool oven is not always a bad part. Overloaded racks, a door that is slightly open, and a heavy pan blocking airflow all cause uneven baking. If the thermometer shows a steady problem after you rule those out, it is time to have the oven checked.
When the thermometer keeps showing a gap, we will test the sensor, element or igniter and tell you which. Schedule from the range repair page; our service area shows the counties we reach, a three-hour window is offered, and the cost is written down before the repair starts.