Thermador Cooktop Error Code E0137

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.

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.

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.

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.

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.