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Error code reference

Thermador Cooktop Error Code E013A

Left ADB error checking induction module component: inductor activation relay

Thermador codesThermador cooktop codes

Left ADB error checking induction module component: inductor activation relay — cannot connect/disconnect one of the inductors.

First step from the service manual

Using tool 15000560, identify specific faulty inductors via 'Inductor test' step, then check inductor connections to ADB.

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

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What E013A means on a Thermador cooktop

Error code E013A on a Thermador induction cooktop indicates a fault in the left ADB (Automatic Distribution Board) related to the inductor activation relay. Specifically, the control system has detected that it cannot properly connect or disconnect one or more of the induction heating elements (inductors) on the left side of the cooktop. The ADB is the module responsible for routing power and control signals to individual inductors, and the activation relay within it is the switching component that physically enables or disables each inductor during operation. When this relay fails to respond correctly, the system flags E013A to prevent unsafe or uncontrolled heating.

The most common root causes include a failed or stuck relay within the ADB module, damaged wiring or connectors between the ADB and the affected inductor coil, or a faulty inductor coil itself presenting an out-of-spec load to the relay circuit. Connection issues such as loose, corroded, or burned pins at the inductor harness connectors are also frequent contributors, particularly in units with significant usage hours.

Diagnosis begins with using Thermador diagnostic tool 15000560 to run the dedicated Inductor Test sequence. This tool can isolate which specific inductor or inductors are failing to activate or deactivate on command, narrowing the fault to a particular zone before any disassembly or component replacement. Once the faulty inductor is identified, technicians should inspect the wiring connections from that inductor back to the ADB for continuity, proper seating, and signs of heat damage before concluding the ADB module itself requires replacement.

Source: manufacturer service documentation.

Common causes of E013A

  1. 01

    Faulty inductor activation relay in the ADB

    Part replacement

    The relay inside the ADB module that switches a specific inductor on or off may have failed mechanically or electrically. This is a common cause when the fault is persistent and no wiring damage is found.

  2. 02

    Loose or damaged inductor harness connections

    Wiring / connection

    Connectors between the ADB and the inductor coil can loosen, corrode, or sustain heat damage over time, preventing the relay circuit from completing. Inspect all pins at the inductor connector for proper seating and discoloration.

  3. 03

    Defective inductor coil

    Part replacement

    A shorted or open inductor coil presents an abnormal load to the ADB relay circuit, which can trigger this error. The Inductor Test via tool 15000560 will help isolate which coil is out of spec.

  4. 04

    Wiring harness damage between ADB and inductor

    Wiring / connection

    Chafed, pinched, or broken wires along the harness routing from the ADB to the left-side inductors can interrupt the switching circuit. A visual inspection and continuity check of the harness will identify this fault.

  5. 05

    ADB module internal failure

    Part replacement

    If relay and wiring checks do not resolve the error, the ADB module itself may have sustained internal damage beyond the relay, requiring full module replacement.

See the test procedure for each cause

Frequently asked questions about E013A

What does E013A mean on a Thermador cooktop?
E013A indicates that the left ADB (Automatic Distribution Board) has detected a failure with the inductor activation relay: it cannot properly connect or disconnect one of the left-side induction heating elements. This is a safety fault that prevents uncontrolled or unexpected heating. Diagnosis requires Thermador-specific diagnostic tool 15000560 to run an Inductor Test and identify the specific faulty inductor before inspecting connections to the ADB.
Can I fix E013A myself without a technician?
Diagnosing this error accurately requires the Thermador diagnostic tool 15000560, which is typically only available to authorized service technicians. A knowledgeable DIYer can visually inspect inductor harness connectors for looseness or heat damage, but replacing components like the ADB module or inductor coils involves working with high-voltage induction circuitry and is best handled by a qualified technician.
Is it safe to keep using my Thermador cooktop with error E013A?
It is not recommended to continue using the cooktop while E013A is active. This fault means the control system cannot reliably turn one of the induction elements on or off, which could result in unexpected heating behavior. The cooktop may have already disabled the affected burner zone, but you should stop use and have the unit serviced before resuming cooking.
Will resetting my Thermador cooktop clear the E013A error?
A power reset may temporarily clear the error display, but the underlying fault with the inductor relay circuit will likely cause the code to return once the cooktop attempts to activate the affected burner. A reset is not a fix and should not substitute for proper diagnosis and repair using the Inductor Test procedure.
How much does it cost to repair E013A on a Thermador cooktop?
Repair costs vary depending on what component is at fault. If the issue is a loose or corroded connector, the cost may be limited to a service call fee, typically in the range of $100 to $200. If the ADB module or an inductor coil requires replacement, total costs including parts and labor can range from $300 to $700 or more, depending on part pricing and local labor rates.

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