Thermador Range Error Code F112

F112 indicates that the lower oven temperature has exceeded 650°F, triggering a runaway temperature fault. The range shuts down automatically to prevent damage or a safety hazard. This code points to a problem with the lower oven temperature sensor, the P24 connector on the Power Board, the Power Board itself, or the wiring connected to the lower heating element.

Resetting the range by cycling the power may clear the code temporarily, but it will return if the underlying cause is not repaired. If the sensor resistance is out of spec, the P24 connector is loose, the wiring is damaged, or the Power Board is faulty, the runaway condition will recur as soon as the oven reaches operating temperature. A reset alone is not a fix.

Repair costs vary depending on which component has failed. A lower oven temperature sensor typically costs between $25 and $75 for the part, while a Power Board can range from $150 to $400 or more depending on the model. Adding professional labor, total repair costs generally fall somewhere between $100 and $600. Diagnosing the specific failed component before ordering parts helps avoid unnecessary expenses.

No, you should not use the oven while this fault is active. The F112 code indicates the oven has lost the ability to properly regulate its lower oven temperature, which is a potential fire and safety hazard. Allow the oven to cool fully before inspecting any components, and do not attempt to resume cooking until the root cause has been identified and corrected.

Start by allowing the oven to cool below 650°F, then check the P24 connector on the Power Board for a secure, clean connection. Next, measure the resistance of the lower oven temperature sensor, which should be approximately 1080 ohms at room temperature. If the sensor is out of range, replace it. If the sensor is good and the connector is secure, inspect the wiring to the lower heating element, then replace the Power Board if no other fault is found.