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Error code reference

AEG Washer Error Code E50

Motor or tacho fault.

AEG codesAEG washer codes

Motor or tacho fault.

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What E50 means on a AEG washer

The E50 error code on an AEG washer indicates a fault within the motor system or the tachogenerator (tacho) circuit. The tachogenerator is a small sensor attached to the wash motor that monitors motor speed by generating a voltage signal proportional to rotation. The motor control board uses this signal to regulate drum speed during wash, rinse, and spin cycles. When the signal is absent, erratic, or outside expected parameters, the control board logs E50 and typically halts the cycle to prevent mechanical damage.

The fault can originate from several points in the system. The tacho sensor itself may have failed internally, or the wiring connecting it to the control board may be damaged, corroded, or have a loose connector. The motor brushes, if the machine uses a brushed universal motor, wear down over time and can produce inconsistent contact, leading to abnormal speed readings. In some cases the motor itself has developed a winding fault or bearing failure that causes irregular rotation.

Diagnosing E50 typically involves inspecting the tacho wiring harness for damage or disconnection, checking brush length on brushed motors, and testing tacho coil resistance. A failed motor control module can also produce this code if it is unable to correctly process or supply the required signals to the motor circuit. Component replacement may be necessary depending on which part of the system tests out of specification.

Source: manufacturer service documentation.

Common causes of E50

  1. 01

    Worn motor brushes

    Part replacement

    On brushed universal motors, the carbon brushes wear down with use and lose reliable contact with the commutator. Short or worn brushes produce inconsistent motor operation and trigger tacho faults. Inspect brush length and replace if they are worn below the minimum usable length.

  2. 02

    Faulty or disconnected tacho wiring

    Wiring / connection

    The wiring harness between the tachogenerator and the control board can suffer from loose connectors, corrosion, or physical damage. Check all connectors along this circuit for secure seating and inspect the wires for breaks or chafing.

  3. 03

    Failed tachogenerator sensor

    Part replacement

    The tacho sensor coil can fail internally, producing no speed signal or an erratic one. Testing the coil resistance and comparing it to the expected specification will confirm whether the sensor needs replacement.

  4. 04

    Motor winding or bearing failure

    Part replacement

    A motor with a shorted or open winding, or one with seized or noisy bearings, will not rotate correctly and may produce abnormal tacho readings. Resistance testing of the motor windings and physical inspection for bearing play or noise can confirm this fault.

  5. 05

    Defective motor control board

    Part replacement

    If the motor control module cannot correctly interpret or supply signals in the motor circuit, it can trigger E50 even when the motor and tacho are intact. This is generally confirmed only after all other components have been tested and found to be within specification.

See the test procedure for each cause

Frequently asked questions about E50

What does E50 mean on a AEG washer?
E50 on an AEG washer indicates a motor or tachogenerator fault. The tachogenerator is the sensor that monitors motor speed, and the control board uses its signal to regulate drum rotation. When this signal is missing or incorrect, the machine stops and displays E50 to prevent damage to the motor or drum system.
Can I fix the E50 error myself?
Some causes of E50 are accessible to a competent DIYer. Checking wiring connectors for looseness or corrosion and replacing worn motor brushes are tasks that do not require specialist tools. However, testing tacho coil resistance, motor windings, and diagnosing a faulty control board typically require a multimeter and some technical knowledge. If you are not comfortable working around electrical components inside a washing machine, a qualified technician is recommended.
Is it safe to use my AEG washer when E50 is showing?
No, you should not attempt to run the washer while E50 is active. The error means the machine cannot properly control motor speed, which could result in uncontrolled drum behaviour or further damage to the motor or control board. Leave the machine switched off and unplugged until the fault is diagnosed and repaired.
How much does it cost to repair an AEG washer E50 error?
Repair costs depend on the faulty component. Motor brush replacement is relatively inexpensive, typically in the range of 20 to 60 for parts, plus any labour charge. A replacement tachogenerator or motor wiring repair may cost 40 to 120 in parts. A full motor replacement or a new motor control board can bring the total repair cost to anywhere from 150 to 350 or more including labour.
Will resetting my AEG washer clear the E50 error?
A power reset by unplugging the machine for several minutes may temporarily clear the error display, but it will not resolve the underlying fault. If the motor, tacho sensor, brushes, or wiring have a genuine defect, the error will return as soon as the machine attempts to run a cycle again. A proper repair of the faulty component is required to permanently clear E50.

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