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Error code reference

Thermador Cooktop Error Code E0301

Right ADB relay board incorrect or faulty firmware

Thermador codesThermador cooktop codes
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What the E0301 error code actually means

Your Thermador cooktop has detected a software problem with the control board that runs the right-side burners. The board's internal memory either lost its programming or contains incorrect software, so the cooktop shut down that section to stay safe. A technician will need to use a special tool to reload the correct software onto the board.

Diagnostic procedure

The full E0301 procedure

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1
First diagnostic step
Reprogramme the right ADB induction module using the iService 'flashing' tool.
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Most common causes of E0301

Ranked by how often they cause this code
  1. 1Corrupted firmware from a failed update
  2. 2Blank flash memory on a replacement board
  3. 3Firmware version mismatch
  4. 4Damaged flash memory on the ADB board
  5. 5Faulty ADB relay board

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Questions people ask about E0301

What does E0301 mean on a Thermador cooktop?
E0301 means the right ADB relay board has invalid, corrupted, or missing firmware in its internal flash memory. The microcontroller on the board runs a firmware check at startup and triggers this code when no valid firmware image is found. The right-side induction burner zones will not operate while this fault is active. The fault is resolved by reflashing the board using the Thermador iService tool.
Is it safe to keep using my cooktop when E0301 is displayed?
The right-side burner zones will be disabled while E0301 is active, so there is no risk of those elements operating uncontrolled. The left-side zones may continue to function normally depending on your cooktop model. It is best to schedule a service call promptly rather than continuing to use the appliance in a partially degraded state.
How much does it cost to repair a Thermador cooktop showing E0301?
Repair costs vary depending on whether the board can be reflashed or needs full replacement. If reflashing resolves the issue, you typically pay only for the service call and labor, which can range from roughly $100 to $250 depending on your location and the technician's rates. If the ADB relay board requires replacement, parts and labor combined can range from approximately $300 to $600 or more. Getting a diagnostic quote from a Thermador-authorized service provider before authorizing repairs is advisable.
Can I fix E0301 myself without a technician?
Resolving E0301 requires the Thermador iService flashing tool, which is a proprietary diagnostic device not available to the general public. Because of this, the repair needs to be performed by a Thermador-authorized technician who has access to the tool and the correct firmware files. Attempting to disassemble or replace components without the proper equipment is not recommended.
Will resetting the cooktop clear the E0301 error?
A power reset, such as switching off the circuit breaker and restoring power, will not clear E0301 because the fault is caused by a software problem stored within the board's flash memory. The microcontroller will detect the same invalid firmware on every startup cycle until the board is properly reflashed or replaced. Resetting is not a substitute for the iService reflashing procedure.

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