The "Off" button on a Thermador oven is typically located on the control panel, which is usually positioned on the front of the oven door or above the oven cavity. The control panel houses various buttons and controls to operate the oven, including the "Off" button. The "Off" button is used to turn off the oven and stop any ongoing cooking or baking processes. If you encounter the "F1" error code on the display panel of your Thermador oven, it indicates a fault in the oven's electronic control board or a related component. The "F1" error code is a generic fault code that can be triggered by various issues, such as a faulty temperature sensor, a stuck keypad, or a malfunctioning control board. When you see the "F1" error code, the first step is to turn off the oven to prevent any potential safety risks. To do this, press and hold the "Off" button on the control panel until the oven powers down. Alternatively, you can try turning off the oven by switching off the circuit breaker or unplugging the oven from the power source. After turning off the oven, wait a few minutes before turning it back on to see if the error code clears. If the "F1" error code persists or reappears after resetting the oven, it is essential to refrain from further attempts at troubleshooting or repair, as this could be dangerous and may void the warranty. In such cases, it's best to consult the user manual for specific troubleshooting steps or contact Thermador's customer support or a qualified appliance repair technician for professional diagnosis and resolution of the issue. Attempting to repair the oven yourself without proper knowledge and expertise could lead to further damage or safety hazards.