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Error code reference

AEG Washer Error Code E3

Heater element defect, heating relay defect, or heater element connection defective.

AEG codesAEG washer codes

Heater element defect, heating relay defect, or heater element connection defective.

First step from the service manual

Replace heater element; replace heating relay; check connection.

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

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What E3 means on a AEG washer

The E3 error code on an AEG washer indicates a fault within the heating circuit. This code is triggered when the control board detects an issue with the heater element itself, the heating relay that controls power delivery to the element, or the electrical connections between these components. The heating system is responsible for raising water temperature to the level selected for a given wash cycle, and any disruption in this circuit will cause the machine to flag E3 and typically halt or limit the wash program.

The most common underlying cause is a failed heater element. Over time, the element can burn out or develop an internal short, which alters its resistance characteristics and prevents proper heating. A faulty heating relay on the control board is another possible cause: if the relay fails to close or becomes stuck, it cannot supply current to the element even if the element itself is functional. Wiring and connection faults at the element terminals or relay contacts are also a known source of this error, particularly in older machines where connectors can corrode or loosen due to repeated thermal cycling and vibration.

Diagnosis should begin with a continuity and resistance check of the heater element using a multimeter, followed by inspection of the terminal connections for corrosion, burning, or looseness. If the element and connections check out, attention should shift to the heating relay on the control board. Replacing the heater element is the most frequent repair resolving E3, followed by relay replacement or connection repair.

Source: manufacturer service documentation.

Common causes of E3

  1. 01

    Failed heater element

    Part replacement

    The heating element has burned out or developed an internal short, preventing the machine from heating water. A multimeter continuity test on the element terminals will confirm an open or shorted element.

  2. 02

    Defective heating relay

    Part replacement

    The heating relay on the control board may have failed, meaning power cannot reach the heater element even if the element is intact. This is identified after confirming the element and connections are in good condition.

  3. 03

    Loose or corroded heater connections

    Wiring / connection

    The electrical connectors at the heater element terminals can corrode or work loose over time, interrupting the circuit. A visual inspection of the terminals for discoloration, corrosion, or looseness will reveal this issue.

  4. 04

    Damaged wiring to the heater circuit

    Wiring / connection

    Wiring between the control board and the heater element can develop breaks or burns, especially near heat sources. Inspect the wire harness along its full length for visible damage.

See the test procedure for each cause

Frequently asked questions about E3

What does E3 mean on a AEG washer?
E3 on an AEG washer signals a fault in the heating circuit. The code points to a defective heater element, a failed heating relay, or a problem with the electrical connections in the heater circuit. The machine uses this code to alert you that it cannot properly heat the water during a wash cycle. Diagnosis should start with testing the heater element and inspecting its connections.
Can I fix the E3 error on my AEG washer myself?
Checking and reseating the heater element connections is a task many DIYers can handle safely with the machine unplugged. Replacing the heater element requires disassembling part of the washer and working near electrical components, which is manageable for those comfortable with appliance repair. Replacing the heating relay on the control board is more complex and may be better suited to a qualified technician. Always disconnect power before starting any inspection or repair.
Is it safe to use my AEG washer when E3 is showing?
You should not continue using the washer while E3 is active. A shorted heater element can pose an electrical hazard, and a failed relay or wiring fault may indicate damaged components that could worsen with continued use. The machine will also not heat water correctly, meaning wash results will be compromised. Address the fault before running additional cycles.
How much does it cost to repair an E3 error on an AEG washer?
If only the heater element needs replacement, parts typically cost in the range of $30 to $80, with labor adding $80 to $150 if a technician performs the work. A control board relay repair or full board replacement can push total costs into the $150 to $350 range depending on the board and labor rates in your area. Getting a diagnostic quote before committing to the repair is recommended.
Will resetting my AEG washer clear the E3 error code?
A reset may temporarily clear the E3 code from the display, but the error will return as soon as the machine attempts to heat water again if the underlying fault is not resolved. Resetting without repairing the heater element, relay, or connections does not fix the problem. The code should be treated as a prompt to diagnose and repair the heating circuit rather than dismissed with a reset.

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