The part(s) or condition(s) listed below for the symptom Oven temperature not accurate are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
The temperature control thermostat monitors the temperature inside the oven and cycles on the heat when the oven temperature gets too low. If the temperature control thermostat is not calibrated correctly, it won't cycle on the heat at the proper time. As a result, the oven temperature might be too high or too low. Due to its complexity, the thermostat is very difficult to test.