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Error code reference

Thermador Range Error Code E2

Control not calibrated.

Thermador codesThermador range codes

Control not calibrated.

First step from the service manual

Turn selector knob to OFF, then tweak slightly counterclockwise to clear.

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

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What E2 means on a Thermador range

The E2 error code on a Thermador range indicates that the control board has not been properly calibrated or has lost its calibration state. This condition is tied to the electronic control system, which relies on stored calibration parameters to accurately regulate burner output, oven temperature, and selector knob positions. When the control detects that these parameters are missing, corrupted, or out of acceptable range, it flags the E2 code to alert the user or technician that normal operation cannot be guaranteed.

The most common trigger for this error is a disruption to the control board's memory, which can occur after a power surge, an extended power outage, or an incomplete initialization sequence during startup. The selector knob position is closely tied to the control's calibration logic, and if the knob is in an ambiguous or non-standard position when the control powers up, the board may fail to complete its self-check and register the E2 fault.

The first diagnostic step involves turning the selector knob fully to the OFF position and then nudging it slightly counterclockwise. This action re-engages the control's initialization sequence and can allow the calibration state to reset without replacing any components. If the error persists after this step, further investigation of the control board, its memory retention circuit, and associated wiring connections is warranted.

Source: manufacturer service documentation.

Common causes of E2

  1. 01

    Selector knob in incorrect position at startup

    Wiring / connection

    If the selector knob is not fully in the OFF position when the control powers on, the board may fail its calibration check and trigger E2. Turning the knob to OFF and slightly counterclockwise is the recommended first step.

  2. 02

    Power surge or outage disrupting control memory

    Wiring / connection

    A sudden loss or spike in power can corrupt the calibration data stored in the control board's memory. After power is restored, the board may not be able to complete its initialization, resulting in the E2 fault.

  3. 03

    Faulty or failing control board

    Part replacement

    If the control board's internal memory circuit has degraded, it may repeatedly lose calibration data even after being reset. This is indicated by the E2 error returning shortly after each manual clear.

  4. 04

    Loose or corroded wiring connections to the control board

    Wiring / connection

    Poor electrical connections to the control board can interrupt the signals needed during the calibration sequence. Inspecting and reseating connectors at the board can help rule this out.

  5. 05

    Incomplete or interrupted initial setup sequence

    Wiring / connection

    If the range was powered on for the first time or after a board replacement without completing the proper initialization, the control may register as uncalibrated and display E2.

See the test procedure for each cause

Frequently asked questions about E2

What does E2 mean on a Thermador range?
The E2 code on a Thermador range means the control has not been calibrated or has lost its calibration state. The electronic control board relies on stored calibration data to regulate the range properly, and when that data is missing or invalid, it triggers this fault. It is often caused by a power disruption or the selector knob being in the wrong position during startup.
How do I fix the E2 error on my Thermador range?
Start by turning the selector knob fully to the OFF position, then nudge it slightly counterclockwise. This re-engages the control's initialization routine and frequently clears the E2 code without any tools or parts. If the error returns after this reset, further diagnosis of the control board and its wiring connections is needed.
Is it safe to use my Thermador range while the E2 code is showing?
It is not recommended to operate the range while the E2 error is active. Because the code indicates the control is not properly calibrated, the range may not regulate temperature or burner output accurately, which could create a safety risk. Clear the fault first and confirm normal operation before resuming use.
Will resetting the range clear the E2 error code?
The specific reset for E2 involves turning the selector knob to OFF and then slightly counterclockwise, not simply cycling power to the unit. A general power cycle alone may not resolve the calibration fault. If the knob-based reset does not work, the control board may need further inspection or replacement.
How much does it cost to repair an E2 error on a Thermador range?
If the error clears with the knob reset procedure, there is no parts cost involved. If a control board replacement is required, parts and labor costs typically range from $200 to $600 or more depending on the specific model and local labor rates. Getting a diagnostic visit from a qualified technician can help confirm whether a board replacement is actually necessary before spending on parts.

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