You can also test whether the sensor is working properly by using an ohmmeter. As the temperature inside the oven rises, the resistance reading of the temperature sensor should also rise.

If your oven isn't cooking properly, it may not be heating to the set temperature like it should. Use this quick test to check and diagnose you oven.

Get an oven thermometer, learn the quirks of your appliance and be willing to call in the the pros when there are signs of trouble.