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Error code reference

AEG Washer Error Code EAB

Triac for DSP defective.

AEG codesAEG washer codes

Triac for DSP defective.

First step from the service manual

Replace electronics.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What EAB means on a AEG washer

The EAB error code on an AEG washer indicates that the triac controlling the DSP (Digital Signal Processor or drive signal processing circuit) has been detected as defective. A triac is a bidirectional semiconductor switching device used in appliance control boards to regulate power delivery to motors and other high-current components. When this triac fails, the control electronics lose the ability to properly switch or regulate the relevant circuit, triggering the EAB fault.

Triac failures typically occur due to excessive current draw, voltage spikes, or heat buildup on the control board. A shorted triac can cause the circuit to remain permanently on or off, preventing normal wash cycle operation. In some cases, a connected load such as the motor or pump drawing more current than the triac is rated for will cause it to fail. The fault is detected internally by the control electronics, which monitor the triac's switching behavior and flag an EAB code when behavior falls outside expected parameters.

Because the triac is a component soldered directly onto the main control board (PCB), the standard corrective action is full replacement of the electronic control unit rather than attempting component-level repair. This is the recommended first diagnostic step. There is no sensor to test or wiring harness to inspect as the primary resolution path. If a technician has component-level soldering skills, the individual triac could theoretically be replaced, but board replacement is the standard and most reliable approach.

Source: manufacturer service documentation.

Common causes of EAB

  1. 01

    Failed triac on the main control board

    Part replacement

    The triac component on the PCB has shorted or burned out, which is the direct cause of the EAB fault. This is typically visible as a scorched or discolored component on the board.

  2. 02

    Voltage spike or power surge damage

    Part replacement

    A surge in the household power supply can overstress semiconductor components like triacs, causing immediate or progressive failure. Check if the error appeared after a power outage or surge event.

  3. 03

    Overheating of the control board

    Part replacement

    Prolonged operation in high-temperature environments or poor ventilation around the control electronics can degrade triac performance over time and lead to failure.

  4. 04

    Excessive current draw from a connected load

    Part replacement

    If the motor or another component connected to this triac circuit was drawing abnormally high current, it could have caused the triac to fail from overcurrent stress.

See the test procedure for each cause

Frequently asked questions about EAB

What does EAB mean on a AEG washer?
The EAB code on an AEG washer means the triac for the DSP circuit on the main control board has been detected as defective. A triac is a semiconductor switching component that controls power delivery within the electronics. When it fails, the washer cannot complete its normal operation and displays this fault code. Resolving this error requires replacing the main control board electronics.
Can I fix the EAB error on my AEG washer myself?
The recommended fix for EAB is replacing the main electronic control board, which is a moderately complex repair. A technician comfortable with appliance board replacement can perform this job with the correct replacement part. Component-level triac replacement is theoretically possible for someone with advanced soldering skills, but board replacement is the standard and more reliable approach. If you are not experienced with appliance electronics, professional service is recommended.
Is it safe to use my AEG washer when the EAB code is showing?
It is not advisable to continue using the washer while the EAB code is active. A defective triac on the control board can cause unpredictable electrical behavior, and the washer may not operate correctly or may fail to complete cycles. Continued use risks further damage to other control board components. The machine should remain off until the board has been inspected and replaced.
How much does it cost to repair the EAB error on an AEG washer?
Repair costs for an EAB error primarily depend on the price of the replacement control board and labor. Control boards for AEG washers typically range from $150 to $350 or more depending on the model. Adding professional labor, total repair costs can range from $200 to $500 or higher. Getting a quote specific to your model before proceeding is recommended.
Will resetting my AEG washer clear the EAB error code?
Resetting the washer by unplugging it and restoring power is unlikely to permanently clear the EAB error. Because the fault is caused by a physically defective triac on the control board, the error will return as soon as the machine attempts to use that circuit again. A reset may temporarily clear the displayed code, but the underlying hardware failure must be corrected by replacing the control board for a lasting resolution.

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