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Thermador Oven won't turn on

When your Thermador oven won't turn on, start by checking whether any touchpad buttons respond. A few working buttons with others inactive usually point to a faulty touchpad and control panel or touchpad. If none of the buttons respond, the control board is more likely defective and may not be sending voltage to the oven components. For a gas Thermador oven, a damaged bake or broil spark electrode can also prevent the burner from igniting, especially if the electrode has a cracked porcelain housing or worn tip. A failed broil element is another possible cause of an oven not working, particularly if it is visibly blistered or has no continuity. If the oven keeps heating after you try to turn it off, the main control board relay may be stuck. Disconnect power before inspecting parts, and use a multimeter only if you are comfortable testing live voltage and following the wiring diagram. Whether your Thermador oven won't start, is not turning on, or has no power at the controls, enter your model number to find the exact replacement touchpad, control board, spark electrode, or broil element for your oven.

01 - Thermador Range/Stove/Oven Touchpad and Control Panel

If an oven won't turn on, it's possible the touchpad and control panel is defective. One way to help confirm this is to determine if some touchpad buttons respond while others don't. If some of the buttons still work, then it's quite probable the touchpad and control panel is faulty and requires replacement (if none of the buttons work, a defective control board is more likely the cause of the oven not turning on).
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Top Solution

02 - Thermador Range/Stove/Oven Touchpad

If an oven won't turn on, it's possible the touchpad is defective. One way to help confirm this is to determine if some touchpad buttons respond while others don't. If some of the buttons still work, then it's quite probable the touchpad is faulty and requires replacement (if none of the buttons work, a defective control board is more likely the cause of the oven not turning on).
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Top Solution

03 - Thermador Range/Stove/Oven Control Board

The control board usually provides voltage to all of an oven's components, so a defective board can prevent the oven from turning on. If none of the oven control buttons are working, it's likely the control board is at fault. You can inspect the board for signs of damage or a shorted component. You can also use a multimeter to test for voltage reaching the bake or broil elements or igniters after reviewing the appliance's wiring diagram.
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Highly Likely

04 - Thermador Range/Stove/Oven Bake or Broil Spark Electrode

For bake & broil burner ignition an oven burner spark electrode is used to ignite the gas. The electrode is a device that sits right next to the burner. It functions like a spark plug. As power is applied to it a spark jumps from the spark electrode tip to the to the electrode shield, igniting the gas. If the electrode is broken or worn out the spark may not occur. Visually inspect the electrode assembly for cracks in the porcelain housing or damage to the electrode tip itself. Be aware that a proper ground and the correct polarity of the incoming voltage to the range is necessary for the electrode control to sense the pre...sence of a flame once the burner is ignited. If the burner goes off after ignition check for proper ground and the correct polarity at the wall outlet.
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Common

05 - Thermador Range/Stove/Oven Broil Element

When the broil element is heating properly, it glows red hot. If the element does not glow red, this indicates that the element is not heating. Often, if the broil element has burned out, it will be visibly damaged. Inspect the broil element for holes or blisters. To determine if the broil element has burned out, use a multimeter to test the element for continuity. If the broil element does not have continuity, replace it.
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Common

06 - Thermador Range/Stove/Oven Main Control Board

The main control board has relays that send voltage to the bake and broil circuits according to the user settings and sensor input. If one of the control board relays shorts closed, the control board may send continuous voltage to the heating circuit. If the oven continues to heat after it is turned off, the main control board is likely defective. If the control board is defective, replace it.
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Common

Frequently Asked Questions

Why won't my Thermador oven turn on when some buttons still work?
What should I check first if my Thermador oven has no power?
Could a Thermador oven spark electrode or broil element keep the oven from starting?
How do I know whether the Thermador touchpad or control board is defective?
How do I find the correct Thermador oven replacement part?

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