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Error code reference

Thermador Range Error Code E10

Control board checksum error.

Thermador codesThermador range codes

Control board checksum error.

First step from the service manual

Replace Dreefs control board.

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

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What E10 means on a Thermador range

The E10 error code on a Thermador range indicates a control board checksum error. A checksum is a calculated value the board's processor uses to verify the integrity of its stored program data. When the processor runs this self-check and finds that the stored data does not match the expected checksum value, it flags an E10 fault. This typically means the firmware or configuration data held in the board's non-volatile memory has become corrupted or unreadable.

The Dreefs control board is the primary component involved in this fault. This board manages core range functions including burner control, oven temperature regulation, and user interface responses. When its internal memory integrity fails, the board can no longer reliably execute its programming, which may cause erratic behavior, a failure to start, or a locked-out control panel alongside the E10 code.

Corruption of the board's memory can result from power surges, voltage fluctuations during brownouts, or simply age-related degradation of the memory chips. In some cases, a momentary power anomaly can write bad data to the board's memory during an active cycle. Because the fault is internal to the control board's processor and memory, there is no practical field-level repair for the memory corruption itself. The diagnostic path points directly to replacing the Dreefs control board as the resolution.

Source: manufacturer service documentation.

Common causes of E10

  1. 01

    Corrupted control board memory

    Part replacement

    The most direct cause of E10 is corrupted firmware or configuration data stored on the Dreefs control board. This internal memory corruption prevents the board from passing its own self-check and cannot be repaired without replacing the board.

  2. 02

    Power surge or voltage spike

    Part replacement

    A sudden surge or spike in household electrical supply can write bad data to the control board's non-volatile memory. If the E10 error appeared after a storm, power outage, or utility event, a surge is likely the root cause.

  3. 03

    Brownout or power interruption during operation

    Part replacement

    If power dropped or flickered while the range was actively running a cycle, the board may have written incomplete or corrupted data to memory. This can permanently trigger the checksum fault even after power is restored.

  4. 04

    Age-related memory degradation

    Part replacement

    Over time, the non-volatile memory chips on a control board can degrade and lose the ability to reliably retain data. On older ranges, E10 may appear without any single triggering event as the board reaches end of service life.

See the test procedure for each cause

Frequently asked questions about E10

What does E10 mean on a Thermador range?
E10 on a Thermador range indicates a control board checksum error. This means the Dreefs control board has detected that its internally stored program data is corrupted or does not match the expected value. The board performs this self-check to confirm its programming is intact, and when it fails, E10 is displayed. Normal range operation cannot continue until the fault is resolved.
Can I fix the E10 error myself on my Thermador range?
The E10 error points directly to the Dreefs control board as the failed component, and the prescribed fix is board replacement. Because the fault is an internal memory corruption issue within the board itself, there is no user-level adjustment or repair that addresses it. A technician experienced with Thermador appliances should handle the board replacement to ensure proper installation and to confirm the new board resolves the fault.
Will resetting my Thermador range clear the E10 error?
A power reset by unplugging the range or cycling the circuit breaker is worth attempting as a first step, since a one-time power anomaly could have triggered the fault. However, E10 is a checksum error caused by corrupted memory on the control board, and if the memory corruption is genuine, the error will return after power is restored. A persistent E10 after a reset confirms the control board needs replacement.
Is it safe to use my Thermador range while E10 is displayed?
An E10 fault indicates the control board cannot verify the integrity of its own programming, which means the board may not operate burners, the oven, or safety functions reliably. It is not advisable to continue using the range while this error is active. Discontinue use until the control board has been inspected and replaced as needed.
How much does it cost to fix an E10 error on a Thermador range?
The repair cost for an E10 error depends on parts and labor rates in your area. Control board replacement on a Thermador range typically falls in the range of a few hundred dollars for the part alone, with additional labor costs on top. Getting a quote from an authorized service provider before proceeding is recommended, especially if the range is still within its warranty period.

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