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Error code reference

Thermador Cooktop Error Code E0137

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

Thermador codesThermador cooktop codes

Fault in the unit's temperature sensor (NTC on the front), left 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 E0137 means on a Thermador cooktop

Error code E0137 on a Thermador cooktop indicates a fault detected in the NTC (Negative Temperature Coefficient) temperature sensor located at the front of the unit, specifically associated with the left ADB (Appliance Distribution Board) connector. This error is exclusive to North American versions of the cooktop. The NTC sensor is a thermistor whose electrical resistance decreases predictably as temperature increases, allowing the control board to monitor cooking zone temperatures in real time. When the ADB cannot read a valid signal from this sensor, it triggers E0137 to prevent uncontrolled heating conditions.

The fault can result from either a defective NTC sensor or a wiring connection issue between the sensor and the left ADB connector. Because the NTC operates by sending a resistance-based signal, any break in the circuit, corroded terminal, or loose connector will cause the board to register an open or out-of-range reading. A fully failed sensor will typically show either infinite resistance or a short, both of which fall outside the expected operating range and trigger the fault code immediately upon startup.

Diagnosis begins with a thorough inspection of the NTC wiring harness and its connection point at the left ADB connector. Technicians should check for bent or pushed-back pins, damaged insulation, and secure seating of the connector. If wiring checks out, resistance testing of the NTC sensor itself across its terminals will confirm whether the component has failed internally. A faulty NTC sensor will need to be replaced to restore normal operation.

Source: manufacturer service documentation.

Common causes of E0137

  1. 01

    Loose or disconnected NTC connector at the left ADB

    Wiring / connection

    The wiring connector linking the front NTC sensor to the left ADB may have worked itself loose over time due to vibration or previous service work. Visually inspect the connector and firmly reseat it to see if the error clears.

  2. 02

    Damaged wiring harness

    Part replacement

    The wiring between the NTC sensor and the ADB connector may have chafed, pinched, or cracked insulation causing an open or short circuit. Inspect the full length of the harness for visible damage and test continuity with a multimeter.

  3. 03

    Defective NTC temperature sensor

    Part replacement

    The NTC thermistor itself may have failed internally, resulting in a resistance reading that is out of range or completely open. Testing the sensor with a multimeter while at a known temperature will confirm whether the component has failed.

  4. 04

    Corroded or damaged connector terminals

    Wiring / connection

    Moisture or heat exposure can cause corrosion on the NTC connector pins at the ADB, increasing resistance in the circuit and producing a faulty signal. Inspect the terminals closely for oxidation, bending, or pushed-back pins.

  5. 05

    Faulty left ADB

    Part replacement

    If the wiring and NTC sensor both test correctly, the left ADB itself may have failed and is unable to properly read the sensor signal. This is the least common cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about E0137

What does E0137 mean on a Thermador cooktop?
E0137 indicates a fault with the NTC temperature sensor located at the front of the cooktop, connected to the left ADB (Appliance Distribution Board). This error appears when the board cannot detect a valid signal from the sensor, either because the sensor is defective or its wiring connection is loose or broken. This code applies only to North American versions of the cooktop.
Can I fix E0137 myself, or do I need a technician?
A knowledgeable DIYer can start by inspecting the NTC sensor wiring and reseating the connector at the left ADB, which requires accessing the interior of the cooktop. If the issue is a failed sensor or damaged wiring harness, replacing those components is more involved and may be best handled by a qualified technician. Working inside the cooktop requires disconnecting power first and having some comfort with electrical components.
Is it safe to use my Thermador cooktop while E0137 is showing?
It is not recommended to continue using the cooktop while this error is active. The NTC sensor is responsible for monitoring temperature at the front of the unit, and operating without a reliable temperature reading could lead to uncontrolled heating. Power the cooktop off until the fault has been properly diagnosed and repaired.
Will resetting the cooktop clear the E0137 error?
A power reset may temporarily clear the error code, but it will return if the underlying problem with the NTC sensor or its wiring has not been resolved. If the code comes back after cycling power, the sensor or wiring connection needs to be inspected and repaired before the fault will stay cleared.
How much does it cost to repair a Thermador cooktop showing E0137?
If the fix is simply reseating a loose connector, there may be no parts cost, though a service call fee typically runs in the range of $80 to $150. If the NTC sensor itself needs replacement, parts and labor combined can range from $150 to $350 depending on your location and the technician's rates. A faulty ADB board would represent the higher end of repair costs.

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