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Error code reference

Thermador Range Error Code d:15

WFMC motor control

Thermador codesThermador range codes
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What the d:15 error code actually means

Your Thermador range is displaying an error because the motor that controls a fan or other moving part is working too hard, either because something is blocking or jamming it, or because the motor itself is worn out. The range's electronics detected this strain and stopped the motor to prevent damage. A technician will need to inspect the motor and any parts connected to it to find and fix the root cause.

Diagnostic procedure

The full d:15 procedure

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1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
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Most common causes of d:15

Ranked by how often they cause this code
  1. 1Mechanical binding in the motor drivetrain
  2. 2Worn or failed motor bearings
  3. 3Motor winding failure or short
  4. 4Damaged or corroded wiring harness
  5. 5Faulty WFMC motor control board

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Questions people ask about d:15

What does d:15 mean on a Thermador range?
Error code d:15 on a Thermador range is a power limiter warning from the WFMC motor control circuit. It indicates that the motor connected to this circuit is overloaded or mechanically binding, causing it to draw more current than the control board allows. The board triggers this fault to protect the motor and electronics from damage caused by sustained overcurrent conditions.
Is it safe to use my Thermador range while d:15 is active?
Operating the range with an active d:15 fault is not recommended. The error indicates a motor is overloaded or binding, and continued use could cause the motor to overheat, damage the control board, or worsen an underlying mechanical failure. It is best to stop using the affected function until the root cause has been identified and corrected.
How much does it cost to repair a Thermador range with a d:15 error?
Repair costs vary depending on the root cause. Wiring harness repairs or clearing a mechanical obstruction may fall in a lower range, while replacing the motor could cost between $150 and $400 in parts alone, and replacing the WFMC motor control board may add another $100 to $350 or more depending on the specific board. Professional labor typically adds $100 to $200 on top of parts costs, so total repairs commonly range from around $150 to over $600 for complex motor or board replacements.
Can I fix d:15 on my Thermador range myself?
Some causes of d:15 are accessible to a knowledgeable DIYer, such as clearing a physical obstruction from around the motor or inspecting and reseating wiring connectors. However, testing motor windings, evaluating bearing condition, and replacing the motor control board require disassembly and familiarity with electrical testing tools like a multimeter. If you are not comfortable working inside the appliance, a qualified technician should handle the repair.
Will resetting my Thermador range clear the d:15 error code?
A power reset may temporarily clear the d:15 code, but it will return if the underlying problem is not resolved. Because the fault is triggered by a real condition such as excessive motor current or mechanical binding, the control board will detect the same issue again as soon as the motor is asked to run. A reset alone is not a repair.

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