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Thermador Oven Error Code F13

Power board not calibrated.

Thermador codesThermador oven codes

Power board not calibrated.

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What F13 means on a Thermador oven

The F13 error code on a Thermador oven indicates that the power board has not been calibrated. The power board, also referred to as the power control board or relay board, is responsible for managing voltage distribution to heating elements, the control system, and other electrical components within the oven. Calibration data is typically stored in the board's non-volatile memory and is used to ensure accurate power delivery and temperature regulation. When this calibration data is absent, corrupted, or cannot be read, the control system throws the F13 fault to prevent operation under potentially inaccurate conditions.

This error most commonly appears after a power board replacement where the new board has not been programmed or calibrated to the specific unit. It can also surface after a significant power surge or electrical event that corrupts the stored calibration values on an existing board. In some cases, a communication failure between the main control board and the power board can cause the system to incorrectly report that calibration is missing, even if the board itself is intact.

Diagnosing F13 requires determining whether the issue is a genuinely uncalibrated or blank power board, a corrupted memory condition on an existing board, or a communication fault between boards. A technician will typically need to assess whether the board requires reprogramming through a calibration procedure or whether board replacement followed by proper calibration setup is the appropriate path forward.

Source: manufacturer service documentation.

Common causes of F13

  1. 01

    Replacement power board not calibrated

    Wiring / connection

    If the power board was recently replaced, the new board may have shipped without unit-specific calibration data. This is the most common trigger for F13 and requires a calibration procedure to be performed after installation.

  2. 02

    Corrupted calibration memory from power surge

    Wiring / connection

    A power surge or sudden power loss can corrupt the non-volatile memory on the power board where calibration values are stored. If the board is otherwise functional, reprogramming may restore normal operation.

  3. 03

    Faulty power board with memory failure

    Part replacement

    If the board's onboard memory has failed permanently, it will be unable to retain calibration data even after reprogramming. In this case, the board must be replaced and then calibrated.

  4. 04

    Communication failure between control board and power board

    Wiring / connection

    A wiring harness issue or a fault in the main control board can interrupt communication between the two boards, causing the system to falsely report a calibration error. Inspecting connectors and wiring between the boards is part of ruling this out.

See the test procedure for each cause

Frequently asked questions about F13

What does F13 mean on a Thermador oven?
F13 on a Thermador oven means the power board has not been calibrated or the system cannot read its calibration data. The power board requires stored calibration settings to manage voltage and heating accurately. This error prevents the oven from operating until the calibration issue is resolved. It most often appears after a board replacement or following a power surge.
Can I fix the F13 error on my Thermador oven myself?
The F13 error typically requires a technician to perform a calibration procedure on the power board, which involves specialized steps that are not a standard homeowner repair. If the fault was caused by a power surge, a technician may be able to reprogram the board without replacing it. Attempting to work on the power board without proper training is not recommended due to the high voltage components involved.
Is it safe to use my Thermador oven when the F13 code is showing?
The oven will generally prevent normal operation when F13 is active, which is a protective response to the uncalibrated board condition. You should not attempt to bypass or ignore this fault. Continuing to use an oven with a power management issue could result in inaccurate temperatures or potential electrical hazards.
Will resetting my Thermador oven clear the F13 error?
A basic reset, such as cycling the circuit breaker, is unlikely to permanently clear F13 because the underlying cause is missing or corrupted calibration data rather than a temporary glitch. The code may clear briefly after a reset but will return once the system checks for calibration on startup. A proper fix requires calibration or board repair by a qualified technician.
How much does it cost to repair a Thermador oven with an F13 error?
Repair costs for an F13 error can vary widely depending on whether the power board needs reprogramming only or full replacement. A calibration service call alone might fall in the range of $100 to $250, while a power board replacement combined with calibration could run anywhere from $300 to $600 or more depending on parts and labor rates in your area. Getting a diagnostic estimate from a Thermador-authorized technician is the best starting point.

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