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Error code reference

Thermador Range Error Code d:16

WFMC motor control

Thermador codesThermador range codes

WFMC motor control: Motor high temperature switch off (motor overloaded or binding).

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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What d:16 means on a Thermador range

Error code d:16 on a Thermador range indicates that the WFMC (washing/fan motor control) motor has triggered its internal high-temperature protection switch. This thermal cutoff is a built-in safety feature within the motor control circuit that activates when the motor reaches an unsafe operating temperature. When this switch trips, the control board halts motor operation to prevent permanent damage to the motor windings or associated electronics.

The two primary causes identified for this fault are motor overloading and mechanical binding. Motor overloading occurs when the motor is drawing more current than its rated capacity, which generates excess heat in the windings. Mechanical binding refers to a physical restriction in the motor shaft, fan assembly, or whatever component the motor drives, forcing the motor to work against increased resistance. In either case, the sustained high current draw translates directly to elevated heat within the motor housing, eventually triggering the thermal protection switch.

Because d:16 points specifically to the motor and its control circuitry, the diagnostic process should focus on the mechanical load the motor is driving before assuming the motor itself has failed. Inspecting for obstructions, worn bearings, or seized components in the driven assembly is a necessary first step. If no mechanical restriction is found, the motor control board or the motor's own thermal characteristics may be at fault, and resistance or current draw measurements at the motor terminals would be the appropriate next diagnostic action.

Source: manufacturer service documentation.

Common causes of d:16

  1. 01

    Mechanical binding in the driven assembly

    Part replacement

    A seized bearing, jammed fan blade, or foreign object obstructing the component the motor drives forces the motor to draw excessive current, generating heat until the thermal switch trips. Manually rotating the motor shaft or fan assembly will reveal stiffness or a hard stop if binding is present.

  2. 02

    Motor overloading from a failing motor

    Part replacement

    As motor windings degrade over time, internal resistance changes and the motor draws more current than its rated load, causing overheating under normal operating conditions. A multimeter reading of winding resistance that falls outside the expected range for the motor indicates the motor itself needs replacement.

  3. 03

    Blocked or restricted airflow around the motor

    Wiring / connection

    Grease buildup, debris accumulation, or a clogged ventilation path around the motor housing can prevent adequate cooling, causing ambient heat to build up around the motor even when its load is normal. Inspecting and cleaning the motor compartment and any associated vents is a straightforward first check.

  4. 04

    Faulty motor control board

    Part replacement

    If the WFMC motor control board is sending incorrect voltage or duty-cycle signals to the motor, the motor can be driven beyond its intended parameters, producing excess heat. Inspect the control board for visibly burned components, damaged traces, or failed capacitors.

  5. 05

    Defective motor thermal switch

    Part replacement

    The thermal protection switch within the motor can fail in a closed or intermittently triggering state, causing nuisance faults even when the motor temperature is within a safe range. If all mechanical and electrical checks on the motor and its load come back normal, the thermal switch itself may need to be tested or the motor replaced.

See the test procedure for each cause

Frequently asked questions about d:16

What does d:16 mean on a Thermador range?
Error code d:16 means the WFMC motor control circuit has detected that the motor reached an unsafe operating temperature and triggered its high-temperature protection switch to shut the motor off. This is a safety mechanism designed to prevent permanent motor damage from overloading or mechanical binding. The range will not resume normal operation until the underlying cause is addressed.
Can I fix d:16 on my Thermador range myself?
Some causes of d:16, such as clearing debris blocking the motor or cleaning grease-clogged ventilation around the motor compartment, can be handled without professional help. However, diagnosing a failing motor, testing the motor control board, or replacing components requires electrical testing knowledge and comfort working with appliance wiring. If you are not experienced with appliance repair, having a qualified technician diagnose the fault is the safer approach.
Is it safe to keep using my Thermador range when d:16 is displayed?
You should not attempt to continue operating the range while this fault is active. The error indicates a motor has overheated, and continued use without resolving the cause risks permanent motor damage or, in cases of severe binding, additional mechanical failures. Discontinue use and allow the appliance to cool fully before beginning any inspection.
Will resetting the range clear the d:16 error code?
A power reset by disconnecting the range from its power supply for several minutes may temporarily clear the code, especially if the motor was allowed to cool down completely. However, if the underlying cause, such as mechanical binding, a failing motor, or a faulty control board, is not corrected, the error will return as soon as the motor is operated again and reaches high temperature. A reset alone is not a repair.
How much does it cost to repair a Thermador range showing error code d:16?
Repair costs vary considerably depending on the root cause. Cleaning a blocked motor compartment may involve only a service call fee, typically in the range of $75 to $150. Replacing a motor or motor control board on a Thermador range can bring total repair costs to anywhere from $200 to $600 or more, depending on the specific parts required and local labor rates. Getting a diagnostic visit from a qualified technician is the best way to obtain an accurate estimate for your specific situation.

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