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Error code reference

AEG Washer Error Code C2

Drain pump blocked/not working, pump interrupted, reduced pump performance, or pressure sensor/pressure…

AEG codesAEG washer codes

Drain pump blocked/not working, pump interrupted, reduced pump performance, or pressure sensor/pressure switch defect.

First step from the service manual

Remove foreign object from pump; replace pump; check drain system; replace pressure sensor or pressure switch.

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

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What C2 means on a AEG washer

The C2 error code on an AEG washer indicates a fault within the drain system or pressure sensing circuit. The machine's control board has detected that water is not being evacuated at the expected rate, that the drain pump has stopped functioning entirely, or that the pressure sensor or pressure switch responsible for monitoring water levels is providing incorrect readings. This code can trigger mid-cycle when the washer attempts to drain and fails to reach an empty state within the allotted time window.

The drain pump is the most commonly implicated component. Foreign objects such as coins, buttons, lint, or small garments can become lodged in the pump impeller, blocking rotation and reducing or stopping flow entirely. Even partial blockages reduce pump performance enough to trigger the C2 fault. The drain hose itself should also be inspected for kinks, clogs, or improper installation height, as these conditions create back-pressure that the pump cannot overcome.

When the drain system appears physically clear, attention should shift to the pressure sensor or pressure switch. These components communicate water level information to the control board throughout the cycle. A defective or failing pressure sensor can send incorrect signals suggesting the drum still contains water even after successful draining, causing the board to log a C2 fault. In this scenario, the pump and drain path may be fully functional, and replacing the pressure sensor or pressure switch resolves the error.

Source: manufacturer service documentation.

Common causes of C2

  1. 01

    Foreign object blocking the drain pump

    Wiring / connection

    Coins, buttons, or small debris can lodge in the pump impeller, preventing it from spinning properly. Check and clean the pump filter access panel, which is typically located behind a small door at the lower front of the machine.

  2. 02

    Failed or seized drain pump

    Part replacement

    The pump motor itself may have burned out or seized, producing no water movement even with a clear impeller. A seized pump often produces a humming noise during the drain phase with no actual water evacuation.

  3. 03

    Kinked or clogged drain hose

    Wiring / connection

    A bent, kinked, or partially blocked drain hose restricts flow and reduces pump performance enough to trigger the fault. Inspect the full length of the drain hose from the machine to the standpipe or sink connection.

  4. 04

    Defective pressure sensor or pressure switch

    Part replacement

    A faulty pressure sensor can incorrectly report that water remains in the drum after draining is complete, causing the control board to register a drain fault. If the drum is actually empty when C2 appears, this component is a likely culprit.

  5. 05

    Blocked pump filter

    Wiring / connection

    The pump filter catches lint and small debris over time and can become fully clogged, starving the pump of water flow. Regular filter cleaning is required maintenance and should be the first physical check performed.

See the test procedure for each cause

Frequently asked questions about C2

What does C2 mean on a AEG washer?
The C2 code indicates a fault in the drain system or water level sensing circuit. It can mean the drain pump is blocked by a foreign object, the pump has reduced performance or has failed entirely, or the pressure sensor or pressure switch is defective. The washer displays this code when it cannot confirm that the drum has drained within the expected time frame.
How do I fix the C2 error on my AEG washer?
Start by cleaning the pump filter, located behind the small access panel at the lower front of the machine, and remove any foreign objects you find. Next, check the drain hose for kinks or blockages. If the drain path is clear and the error persists, the pump itself or the pressure sensor may need to be replaced. Addressing the physical blockage or component failure is required to clear the fault permanently.
Will resetting my AEG washer clear the C2 error?
A reset may temporarily clear the C2 code from the display, but the error will return as soon as the washer attempts to drain again if the underlying cause has not been addressed. Resetting without fixing the blocked pump, faulty drain hose, or defective pressure sensor is not a lasting solution.
Is it safe to keep using my AEG washer when C2 is showing?
It is not recommended to continue running the washer while C2 is active. If the machine cannot drain properly, water can remain in the drum and potentially overflow or cause damage to internal components over time. Stop using the appliance and diagnose the drain system before running another cycle.
How much does it cost to repair a C2 error on an AEG washer?
If the fix is simply clearing a blocked pump filter or removing a foreign object, the repair can cost nothing beyond your time. Replacing a drain pump typically involves parts and labor costs ranging from around $100 to $250 depending on your location and the specific pump required. Replacing a pressure sensor or pressure switch is generally a lower-cost repair, with parts and labor often falling in the $75 to $175 range.

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