Thermador Range Error Code F23

F23 indicates that the lower oven cancel key has been detected in a shorted-low condition on a Thermador range using the Sago control platform. The control is reading the cancel key as continuously activated even when it is not being pressed. The error can also accompany keyboard gain instability, which affects the reliability of the entire touch panel. The root cause is typically a loose Molex connector, a damaged touch panel, or a failing control display PCB.

It is not recommended to operate the range while F23 is active, as the control may not reliably accept or cancel commands due to the shorted key condition and potential keyboard gain instability. An unresponsive or erratically behaving control panel creates a risk of unintended oven operation. Disconnecting the range from power and scheduling a repair before further use is the safest course of action.

Repair costs vary depending on which components need to be replaced. A touch panel replacement or a control display PCB replacement for a Thermador range typically falls in the range of $150 to $500 or more per part, depending on the specific model. Adding professional labor costs, total repair estimates commonly range from $250 to $700 or higher. Replacing both the touch panel and control display PCB together, which is sometimes necessary, will place the repair toward the higher end of that range.

A knowledgeable DIYer can start by inspecting and reseating the Molex connector between the control display PCB and the touch panel, since a loose connection is the most common and easiest cause to address. If the connector is secure and the error persists, replacing the touch panel or the control display PCB typically requires ordering the correct part and safely accessing the control area of the range. Working inside the control panel involves exposure to line voltage components, so the unit should always be disconnected from power before any inspection or repair.

Resetting the range by cycling power may temporarily clear the F23 error, but it will return if the underlying hardware fault is not corrected. A loose Molex connector might allow the code to clear after a reset if the connection temporarily re-establishes, but a damaged touch panel or failing PCB will cause the error to reappear. A permanent fix requires inspecting and correcting the physical cause of the shorted key condition.