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Error code reference

Thermador Cooktop Error Code F2320

Inductor overheating on right ADB

Thermador codesThermador cooktop codes

Inductor overheating on right ADB — hobs switched off to prevent overheating of the inductor.

First step from the service manual

Switch off the appliance and leave it to cool down for 20-30 minutes.

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

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What F2320 means on a Thermador cooktop

The F2320 error code indicates that the inductor on the right ADB (Active Boost Driver) zone of the cooktop has reached a temperature threshold that exceeds safe operating limits. To protect the component from thermal damage, the cooktop's control system automatically shuts off the affected hobs. This is a protective shutdown response, not a component failure in itself, though repeated triggering of this code can indicate an underlying issue that warrants closer inspection.

Inductors in induction cooktops generate electromagnetic fields to heat cookware, and they produce heat as a byproduct of this process. Each inductor relies on adequate airflow and proper cooling to maintain safe operating temperatures. When airflow is obstructed, when the cooktop is used at high power settings for extended periods, or when the internal cooling fan is not functioning correctly, heat builds up in the inductor faster than it can dissipate. The onboard temperature sensors detect this rise and trigger the F2320 fault to prevent permanent damage.

The first diagnostic step is to power off the cooktop and allow it to cool for 20 to 30 minutes before attempting to restart. If the error clears after cooling and does not return under normal use, the cause was likely a temporary overheating condition such as prolonged high-power cooking or blocked ventilation. If the code returns quickly or consistently, further diagnosis of the cooling fan, ventilation path, and inductor assembly is required.

Source: manufacturer service documentation.

Common causes of F2320

  1. 01

    Blocked or restricted ventilation

    Wiring / connection

    Obstructions around the cooktop's air intake or exhaust vents prevent the inductor from cooling properly during operation. Check that the cooktop has adequate clearance on all sides and that vents are not blocked by nearby objects or buildup.

  2. 02

    Extended high-power cooking session

    Wiring / connection

    Running the right ADB zone at maximum power for a long period can push the inductor beyond its thermal limits, triggering a protective shutdown. This is a temporary condition that resolves after the required cool-down period.

  3. 03

    Cooling fan malfunction

    Part replacement

    Induction cooktops use an internal fan to draw heat away from inductors during operation. If the fan motor is failing, running slowly, or not spinning at all, heat accumulates in the inductor and the F2320 fault will trigger quickly even at moderate power levels.

  4. 04

    Dust or debris accumulation inside the unit

    Wiring / connection

    Buildup of grease, dust, or food debris inside the cooktop can insulate components and restrict airflow around the inductor assembly. This is more likely in units that have not been serviced in several years.

  5. 05

    Faulty inductor temperature sensor

    Part replacement

    If the NTC temperature sensor monitoring the right ADB inductor is reading incorrectly high values, the control board may trigger a shutdown even when actual temperatures are within normal range. This requires testing the sensor's resistance output to confirm.

See the test procedure for each cause

Frequently asked questions about F2320

What does F2320 mean on a Thermador cooktop?
F2320 means the inductor on the right ADB zone of your Thermador cooktop has overheated and the hobs have been automatically switched off to prevent damage. This is a thermal protection response built into the cooktop's control system. The cooktop will not resume operation on the affected zone until the inductor cools to a safe temperature. Powering off the unit and waiting 20 to 30 minutes is the recommended first step.
Can I fix the F2320 error myself?
In many cases, the fix is simply allowing the cooktop to cool down and checking that ventilation around the unit is not obstructed. You can also inspect the exterior vents for dust or debris buildup and clear them without professional help. However, if the error returns repeatedly, diagnosing a faulty cooling fan or temperature sensor requires disassembling the unit, which is best handled by a qualified technician.
Is it safe to keep using my cooktop after an F2320 error?
No, you should not continue using the cooktop while the F2320 error is active, as the hobs will already be switched off by the protection system. After the cool-down period, if the error clears and does not return, normal use can resume. If the error reappears quickly during cooking, stop using the cooktop until the underlying cause is identified and corrected to avoid potential damage to the inductor or control components.
Will resetting the cooktop clear the F2320 error?
Switching off the cooktop and allowing it to cool for 20 to 30 minutes will often clear the F2320 error if the cause was temporary overheating. A simple power reset without the cool-down period is unlikely to resolve the fault, since the thermal condition that triggered it needs time to dissipate. If the error returns shortly after resuming use, a reset alone will not fix the problem and further diagnosis is needed.
How much does it cost to repair an F2320 error on a Thermador cooktop?
If the cause is a blocked vent or temporary overuse, there may be no repair cost at all. If a cooling fan replacement is needed, parts and labor costs typically range from around $150 to $350 depending on your location and service provider. Replacing a faulty temperature sensor is generally less involved and may fall in the $100 to $250 range. Costs can be higher if the inductor itself has sustained thermal damage and requires replacement.

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