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Error code reference

Miele Washer Error Code F4124

Drive fault, no drum rotation 3 min after activation signal; tachogenerator could be short-circuited.

Miele codesMiele washer codes

Drive fault, no drum rotation 3 min after activation signal; tachogenerator could be short-circuited.

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What F4124 means on a Miele washer

Error code F4124 on a Miele washer indicates a drive fault in which the drum has failed to rotate within 3 minutes of receiving an activation signal from the control board. This is a motor circuit fault, and the washer's control system monitors drum movement continuously through a tachogenerator (also called a tacho sensor or speed sensor) attached to the drive motor. When the control board sends a run command and receives no rotation feedback from the tachogenerator within the 3-minute window, it logs F4124 and halts the cycle to prevent motor damage or overheating.

The tachogenerator is a small generator coil mounted on the rear of the drive motor. It produces a low-voltage AC signal proportional to motor speed, which the control board reads to confirm rotation and regulate spin speeds. If this component develops a short circuit internally, the control board receives a false or absent signal even when the motor itself may be attempting to run. A shorted tachogenerator is specifically called out as a likely cause of this code, making it the primary component to inspect and test.

Beyond a shorted tachogenerator, other mechanical and electrical failures can produce this fault. A seized drum bearing, a jammed drum caused by a foreign object between the tub and drum, a failed drive motor, or damaged wiring in the motor circuit can all prevent rotation or disrupt the feedback signal. The fault points to a breakdown somewhere in the chain between the control board command and confirmed drum movement.

Source: manufacturer service documentation.

Common causes of F4124

  1. 01

    Shorted tachogenerator

    Part replacement

    The tachogenerator coil on the drive motor can develop an internal short circuit, causing it to send no usable signal to the control board. Test the tacho coil for resistance and check for short to ground to confirm this failure.

  2. 02

    Tachogenerator wiring fault

    Wiring / connection

    Wiring between the tachogenerator and the control board can suffer from chafing, broken connectors, or corrosion, interrupting the rotation feedback signal. Inspect the full wiring harness from the motor to the board for visible damage and check connector continuity.

  3. 03

    Drive motor failure

    Part replacement

    The drive motor itself may have failed due to a burned winding or seized bearings, preventing any drum rotation from occurring. Check for motor continuity, inspect for burning or discoloration, and confirm the motor shaft turns freely.

  4. 04

    Seized or obstructed drum

    Wiring / connection

    A foreign object lodged between the drum and the outer tub, or worn and seized drum bearings, can physically prevent the drum from rotating even when the motor runs. Manually rotate the drum by hand with power off to check for resistance or grinding.

  5. 05

    Control board fault

    Part replacement

    If the control board is not properly sending the activation signal or cannot process the tachogenerator feedback, F4124 can be triggered even when the motor and sensor are functional. This is the least common cause and should be diagnosed only after ruling out the motor circuit components.

See the test procedure for each cause

Frequently asked questions about F4124

What does F4124 mean on a Miele washer?
F4124 means the washer detected a drive fault because the drum did not rotate within 3 minutes of the activation signal being sent to the drive motor. The control board monitors drum movement through a tachogenerator on the motor, and if no rotation is confirmed in that window, the machine stops and displays the code. A shorted tachogenerator is specifically identified as a likely cause, along with motor failure, wiring faults, or a physically blocked drum.
Can I fix F4124 myself or do I need a technician?
Some causes of F4124 are accessible to a knowledgeable DIYer, such as checking for a drum obstruction, inspecting wiring connectors, or manually testing the tachogenerator coil with a multimeter. However, replacing the tachogenerator, drive motor, or control board involves disassembling the machine and working near electrical components, which is best handled by a qualified technician if you are not comfortable with appliance repair.
Will resetting the washer clear the F4124 error?
A reset may temporarily clear the code, but if the underlying fault is still present, F4124 will return as soon as the machine attempts to run the drum again. The code is triggered by an active hardware failure in the drive or motor circuit, so a reset alone is not a fix. The root cause must be diagnosed and repaired for the washer to operate normally.
Is it safe to use my Miele washer when F4124 is displayed?
No, you should not attempt to run the washer when F4124 is active. The machine has detected that the drum is not rotating, which means laundry will not be washed and the motor may be at risk of overheating if it is attempting to run without movement. Leave the washer powered off until the fault is diagnosed and repaired.
How much does it cost to repair a Miele washer with error code F4124?
Repair costs depend on the component at fault. A tachogenerator replacement is generally the least expensive repair, typically ranging from roughly $80 to $180 including parts and labor. A drive motor replacement is more involved and can range from approximately $250 to $500 or more depending on the model and labor rates in your area. A control board replacement tends to be the most costly option and should only be pursued after other components have been ruled out.

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