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Error code reference

Thermador Cooktop Error Code E0342

Right ADB error checking induction module component: A/D current converter

Thermador codesThermador cooktop codes

Right ADB error checking induction module component: A/D current converter — error measuring the current through the inductors.

First step from the service manual

Replace the right relay board (ADB).

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What E0342 means on a Thermador cooktop

Error code E0342 on a Thermador induction cooktop indicates a fault in the right ADB (Analog Distribution Board) related to the analog-to-digital current converter. Specifically, the ADB is failing to accurately measure the current flowing through the induction coil inductors on the right side of the cooktop. This measurement circuit is critical for safe and efficient operation: the control system continuously monitors inductor current to regulate power output, detect cookware, and prevent overcurrent conditions. When the A/D converter loses the ability to read these current values accurately, the board flags the fault and disables the affected induction zones to prevent damage.

The ADB (right relay board) houses the circuitry responsible for switching power to the induction modules and monitoring electrical feedback from those modules. The A/D converter on this board translates the analog current signal from the inductors into a digital value the main control board can process. A failure in this converter can stem from a damaged relay board, corrupted signal pathways, failed sensing components on the board, or electrical stress from power surges or overcurrent events that degrade the converter circuitry over time.

The primary diagnostic step for E0342 is replacement of the right relay board (ADB), as the fault is localized to that board's internal measurement circuitry. Before replacing the board, technicians should inspect the wiring harness connections between the ADB and the induction modules for corrosion, loose pins, or damaged insulation. However, if connections are intact and secure, the board itself is the most likely failed component.

Source: manufacturer service documentation.

Common causes of E0342

  1. 01

    Failed right ADB relay board

    Part replacement

    The A/D current converter circuitry on the right ADB relay board has failed internally, preventing accurate current measurement through the inductors. This is the most common cause and is the first component replacement recommended in the diagnostic procedure.

  2. 02

    Power surge or overcurrent damage

    Part replacement

    A voltage spike or overcurrent event can degrade or destroy the sensitive analog converter components on the ADB. Signs include burn marks, discoloration, or a faint electrical odor near the board.

  3. 03

    Loose or corroded wiring harness connections

    Wiring / connection

    Poor connections between the ADB and the induction modules can disrupt the current feedback signal and trigger this fault. Inspect all connector pins at the ADB for corrosion, bent terminals, or loose seating.

  4. 04

    Damaged inductor or induction module wiring

    Part replacement

    A fault in the inductor coil itself or its associated wiring could produce abnormal signals that overwhelm or confuse the A/D converter on the ADB. Check coil wiring for visible damage or short circuits.

See the test procedure for each cause

Frequently asked questions about E0342

What does E0342 mean on a Thermador cooktop?
E0342 indicates that the right ADB (relay board) has detected an error in its analog-to-digital current converter, which is responsible for measuring current through the induction coil inductors on the right side of the cooktop. When this measurement fails, the cooktop disables the affected zones to protect the appliance. The fault is localized to the right relay board and its associated measurement circuitry.
Can I fix E0342 myself, or do I need a technician?
Resolving E0342 typically requires replacing the right ADB relay board, which involves working inside the cooktop with high-voltage components. This repair is best performed by a qualified appliance technician. Knowledgeable DIYers comfortable with appliance electronics can inspect wiring harness connections first, but the board replacement itself carries significant electrical risk if proper precautions are not taken.
Is it safe to use my Thermador cooktop while E0342 is displayed?
The cooktop will disable the right-side induction zones when E0342 is active, which prevents those zones from operating. You should not attempt to bypass this fault or continue using the affected zones. Left-side zones may still function depending on the cooktop configuration, but the appliance should be serviced before relying on it for regular cooking.
Will resetting the cooktop clear the E0342 error?
A power reset by turning off the circuit breaker for 30 to 60 seconds may temporarily clear the error display, but E0342 will almost certainly return if the underlying board fault is not repaired. The A/D converter failure on the ADB is a hardware issue that does not resolve itself through resets. Clearing the code without repairing the board is not a long-term solution.
How much does it cost to repair a Thermador cooktop with error code E0342?
Repair costs for E0342 typically include the price of a replacement right ADB relay board plus labor. Parts alone for Thermador induction relay boards generally range from $150 to $400 depending on the specific model, with professional labor adding another $100 to $250. Total repair costs commonly fall in the range of $250 to $650, though this varies by region and service provider.

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