Thermador Cooktop Error Code E0146

Error code E0146 on a Thermador induction cooktop signals a fault within the left ADB (Appliance Data Bus) induction module, specifically related to the pot detection sensor circuit. The pot detection sensor is a critical component of induction cooking technology: it uses electromagnetic sensing to verify that compatible cookware is present on the surface before allowing the inverter to energize the coil. When this sensor fails to detect pots correctly, the control system registers the E0146 fault and disables that cooking zone to prevent uncontrolled energy output.

The first diagnostic step focuses on the wiring between the power board (PB) and the left ADB module. Communication between these two boards depends on a stable, properly connected data bus. Loose connector pins, chafed wiring insulation, or corroded terminals along this harness can interrupt the sensor signal and trigger the error without any actual failure of the sensor component itself. Technicians should inspect the full length of the wiring run, checking for continuity and secure seating at both the PB and ADB connectors.

If wiring checks out, the fault likely resides in the left ADB induction module itself. The pot detection sensor circuitry is integrated into this module, and an internal component failure within the ADB can cause incorrect or absent pot detection readings. In some cases, the power board may also be implicated if it is failing to supply the correct reference signals to the ADB. Systematic component-level testing is required to isolate whether the ADB module or the PB is the source of the fault.