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Error code reference

Thermador Range Error Code F113

Runaway upper (or single) oven temperature exceeding 950°F.

Thermador codesThermador range codes

Runaway upper (or single) oven temperature exceeding 950°F.

First step from the service manual

Check P4 connector on Power Board; check sensor resistance (~1080 ohms at room temperature); if sensor OK replace Power Board; check wiring to heating element.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F113 means on a Thermador range

The F113 error code on a Thermador range indicates a runaway temperature condition in the upper oven (or single oven on single-cavity models), where the oven temperature has exceeded 950°F. This is a critical safety fault. The oven's control system continuously monitors the cavity temperature through a resistance-based temperature sensor (RTD probe). When the control detects that the measured temperature has climbed beyond the 950°F threshold without a corresponding control command to reduce heat, it flags a runaway condition and shuts down operation to prevent damage or a fire hazard.

The primary components involved in this fault are the oven temperature sensor, the Power Board, the wiring harness connecting these components, and the heating element circuit. The temperature sensor should read approximately 1080 ohms at room temperature. A shorted sensor can report falsely low temperatures to the control, causing the board to continue driving the heating element even as the actual oven temperature climbs dangerously high. Conversely, a faulty Power Board may misinterpret accurate sensor signals or fail to cut power to the heating element when temperatures reach unsafe levels.

Diagnosis begins at the P4 connector on the Power Board, which is the interface point for the temperature sensor circuit. A loose, corroded, or damaged connector at P4 can introduce resistance errors that skew temperature readings. If the connector and wiring check out, the sensor resistance should be measured directly. If sensor resistance is within spec at roughly 1080 ohms, the fault points to the Power Board itself. The heating element wiring should also be inspected, as a relay stuck in the closed position on the Power Board could cause uncontrolled heating.

Source: manufacturer service documentation.

Common causes of F113

  1. 01

    Faulty oven temperature sensor

    Part replacement

    A shorted temperature sensor can send incorrect resistance readings to the control board, making the board think the oven is cooler than it actually is and causing runaway heating. Measure sensor resistance at the probe terminals; it should read approximately 1080 ohms at room temperature.

  2. 02

    Failed or damaged Power Board

    Part replacement

    If the sensor and wiring check out correctly, the Power Board itself may be misreading the sensor signal or failing to cut power to the heating element. A relay stuck closed on the board is a known cause of uncontrolled temperature rise.

  3. 03

    Loose or corroded P4 connector on the Power Board

    Wiring / connection

    The P4 connector is the junction between the temperature sensor circuit and the Power Board. A loose or corroded connection at P4 can introduce resistance errors that corrupt temperature readings and trigger the F113 fault.

  4. 04

    Damaged wiring to the heating element

    Wiring / connection

    Wiring that is shorted, pinched, or has damaged insulation between the Power Board and the heating element can cause the element to receive continuous power regardless of control commands, leading to runaway temperature.

See the test procedure for each cause

Frequently asked questions about F113

What does F113 mean on a Thermador range?
F113 indicates that the upper oven (or single oven) temperature exceeded 950°F, triggering a runaway temperature safety fault. The control system detected dangerously high heat and shut the oven down to prevent damage or fire. The fault involves the temperature sensor, the Power Board, and associated wiring. The oven should not be operated again until the underlying cause is identified and corrected.
Can I fix the F113 error myself?
Some steps are accessible to a knowledgeable DIYer, such as inspecting and reseating the P4 connector on the Power Board and testing the temperature sensor resistance with a multimeter. If the sensor reads roughly 1080 ohms at room temperature, it is likely functioning correctly and the Power Board may need replacement. Replacing the Power Board or tracing damaged wiring inside the range is more involved and may be better suited to a qualified technician.
Is it safe to use my Thermador range when F113 is displayed?
No, the oven should not be used while F113 is active. The error indicates the oven temperature exceeded 950°F in an uncontrolled manner, which is a fire hazard and can damage the oven cavity, internal components, and cookware. The oven's control system has shut down the heating circuit as a safety measure. Do not attempt to bypass this fault or continue cooking until repairs are completed.
Will resetting the range clear the F113 error code?
A reset, such as cycling power at the breaker, may temporarily clear the fault code, but the underlying cause will remain. If the temperature sensor is shorted, the Power Board is faulty, or wiring is damaged, the runaway condition will recur and F113 will return. A reset should only be used as part of the diagnostic process, not as a repair.
How much does it cost to repair a Thermador range showing F113?
Repair costs vary depending on which component has failed. A replacement oven temperature sensor typically costs in the range of $30 to $80 for the part. A Power Board replacement is more expensive, generally ranging from $150 to $400 or more for the part alone. Adding professional labor for diagnosis and installation will increase the total cost, often bringing a complete repair into the $200 to $600 range depending on the specific failure and your location.

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