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Error code reference

Thermador Cooktop Error Code E0337

Fault in the unit's temperature sensor (NTC on the front), right ADB

Thermador codesThermador cooktop codes

Fault in the unit's temperature sensor (NTC on the front), right ADB — NTC defective or not connected. Only North America versions.

First step from the service manual

Check the wiring of the unit's NTC and make sure it is properly connected to the right ADB connector.

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

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What E0337 means on a Thermador cooktop

Error code E0337 on a Thermador cooktop indicates a fault in the NTC (Negative Temperature Coefficient) temperature sensor located at the front of the unit, specifically on the right ADB (Appliance Drive Board) circuit. This error is exclusive to North American versions of the cooktop. The NTC sensor is a thermistor that changes its electrical resistance in response to temperature changes, allowing the control system to monitor cooktop temperatures accurately. When the ADB cannot read a valid signal from this sensor, whether due to an open circuit, short, or disconnected harness, it triggers E0337 to protect the unit from operating without reliable temperature feedback.

The right ADB serves as a key control interface for managing power output and safety functions on the corresponding cooking zones. If the NTC sensor feeding data to this board is defective or not properly connected, the board cannot regulate heat accurately, which is why the cooktop will flag this fault and may restrict or disable operation of the affected zones.

The most common causes of E0337 are wiring issues between the NTC sensor and the ADB connector rather than outright sensor failure. Connectors can work loose over time due to vibration or thermal cycling, and wiring harnesses can develop breaks or corrosion at connection points. If wiring checks out as intact and properly seated, the NTC sensor itself may have drifted out of its functional resistance range or failed entirely, requiring replacement. Always begin diagnostics at the connector before condemning the sensor or the board.

Source: manufacturer service documentation.

Common causes of E0337

  1. 01

    Loose or disconnected NTC connector at the ADB

    Wiring / connection

    The wiring connector linking the front NTC sensor to the right ADB may have come loose due to vibration or thermal cycling. Inspect the connector seating on the ADB and press it firmly into place to ensure a secure connection.

  2. 02

    Damaged or broken NTC wiring harness

    Part replacement

    The wiring between the NTC sensor and the ADB may have a break, pinch, or burn point, interrupting the signal. Visually inspect the harness for any visible damage and use a multimeter to check continuity along the wire run.

  3. 03

    Corroded or contaminated connector terminals

    Wiring / connection

    Grease, moisture, or oxidation on the NTC connector pins can create enough resistance to cause a false fault reading. Clean the connector terminals carefully and re-seat the connector to restore reliable contact.

  4. 04

    Defective NTC temperature sensor

    Part replacement

    If the wiring and connectors are confirmed to be intact, the NTC thermistor itself may have failed or shifted outside its normal resistance range. A failed sensor will need to be replaced to clear the fault.

  5. 05

    Faulty right ADB (Appliance Drive Board)

    Part replacement

    If the NTC sensor and all wiring test correctly but the error persists, the right ADB may have an internal fault preventing it from reading the sensor signal properly. Board replacement would be required in this scenario.

See the test procedure for each cause

Frequently asked questions about E0337

What does E0337 mean on a Thermador cooktop?
E0337 indicates a fault with the NTC temperature sensor connected to the right ADB (Appliance Drive Board) at the front of the cooktop. This sensor monitors temperature and feeds data to the board for safe heat regulation. The error means the board is not receiving a valid signal from the sensor, either because the sensor is disconnected, the wiring is damaged, or the sensor itself has failed. This error code applies only to North American versions of Thermador cooktops.
Can I fix E0337 myself, or do I need a technician?
A knowledgeable DIYer can start by checking whether the NTC sensor connector is properly seated at the right ADB, which requires accessing the interior of the cooktop. If the fix involves replacing the wiring harness, the NTC sensor, or the ADB itself, those tasks are more involved and may be better handled by a qualified appliance repair technician. Always disconnect power to the cooktop before inspecting any internal components.
Is it safe to use my Thermador cooktop while E0337 is active?
Operating the cooktop with an active E0337 fault is not recommended. The NTC sensor provides temperature feedback that the control board uses to regulate heat output safely. Without a reliable sensor signal, the cooktop cannot accurately manage temperatures on the affected zones, which could lead to uncontrolled heat levels. It is best to stop using the affected zones until the fault is diagnosed and resolved.
Will resetting the cooktop clear the E0337 error?
Resetting the cooktop by cutting power at the breaker for a few minutes may temporarily clear the error display, but it will not fix the underlying problem. If the NTC sensor is still disconnected, damaged, or defective, the fault code will return once the cooktop powers back up and attempts to read the sensor. A proper repair addressing the root cause is required to permanently clear E0337.
How much does it cost to repair a Thermador cooktop showing E0337?
Repair costs vary depending on what component is at fault. If the issue is simply a loose connector, there may be no parts cost, though a service call fee will still apply if a technician is involved. Replacing the NTC sensor typically falls in a lower parts cost range, while replacing the right ADB can be significantly more expensive. In total, professional diagnosis and repair for this type of fault commonly ranges from around $150 to $500 or more depending on parts needed and labor rates in your area.

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