If your Thermador oven light won't turn off, the light switch is the most likely cause. A shorted switch can continue sending power to the oven light even when it is in the off position. Test the switch for continuity with a multimeter and replace it if it shows continuity when off. If the light stays on when you press the control, the touchpad and control panel may not be registering the command. Test the other buttons. If some respond and others do not, the touchpad and control panel or the touchpad may need replacement. If the switch is off but the light remains on, a shorted oven control board may be supplying power continuously. Also check that the Thermador oven door closes tightly. A bent door hinge can prevent the light switch from being actuated, especially if the door opens past 90 degrees. On some models, a shorted door switch can also keep the light on. Enter your model number to find the exact replacement part for your Thermador oven.
01 - Thermador Range/Stove/Oven Light Switch
The light switch sends power to the light. If the light switch is shorted the light will stay on. You can test the light switch for continuity with a multimeter. If the light switch shows continuity even in the off position, the switch is bad and will need to be replaced.
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02 - Thermador Range/Stove/Oven Touchpad and Control Panel
If the light is not turning off when the button is pressed, the button may not be activating. To determine if the touchpad and control panel are defective, try pressing each of the buttons on the control panel. If some of the buttons respond correctly while others don’t, replace the touchpad and control panel.
If the light is not turning off when the button is pressed, the button may not be activating. To determine if the touchpad is defective, try pressing each of the buttons on the control panel. If some of the buttons respond correctly while others don’t, replace the touchpad.
The oven light often gets its power from the control board. If the control board is shorted the light can stay on. If the light switch is in the off position, but the light stays on, the control board has likely shorted and will need to be replaced.
If the door isn't closing properly the light switch may not be actuated, keeping the light on. Check to see that the door is closing tight. If the door opens past 90 degrees, the door hinges are likely bent and will need to be replaced.
On some models, the door switch controls when the oven light is turned on and off. If the door switch has shorted the light may stay on. You can test the switch for continuity with a multimeter. If the switch shows continuity even in the off position, the switch has shorted and will need to be replaced.