[Hubert C]

Hello-
I've got a Tappan 30" range purchased new in 1994 - and still looks and acts that way - until today. My wife decided to bake a pie and set the digital controls for the oven to pre-heat to 350F. Normally, the desired temp will show in the display window, and below that will be the actual oven temp.
Well, the actual temp did not show in the display and the oven continued heating and exceeded 550 degrees F - and kept on going!!!
How can I determine if it is the thermostat assy, circuit board, or ?
Thx - Hubert C

[PS Staff - Sheila]

The clock Is likely the cause.

You can check the resistance of the sensor. It should be 1100 ohms at room temperature.

Here is a link to your range modle 30-4982-23-01.