Error E2 / Cups in AEG dishwasher: what does it mean and how to act

What the E2 warning on AEG dishwashers means

E2 is an internal water-level protection, not a description of a single broken part. The dishwasher activates this preventive shutdown when it detects an out-of-range condition in the water filling, circulation or drainage logic. In practice the machine interrupts the program to avoid overflows, abnormal filling, or unstable hydraulic operation. That makes E2 a safety response: sometimes it reflects a temporary anomaly, sometimes an issue that requires inspection.

First steps: reset and quick inspection

The most sensible immediate action is a complete program reset. Turn the appliance off, wait a few minutes, turn it back on and start a new program. A fresh start often clears transient electronic states and reveals whether the alert was a one-off reading (for example caused by foam, a brief blockage, or a misloaded rack).

How to restart safely

Before forcing several cycles, interrupt the program, disconnect the dishwasher from power for a short time, then attempt a new cycle. Check inside the tub for standing water, ensure the door closes correctly and verify spray arms can rotate freely. Forcing cycles without correcting obvious issues can worsen the condition.

Common causes that trigger E2

• Incorrect water-level reading: debris, grease or sediment on sensors or in passages can alter readings.
• Clogged or dirty filters: obstructed filters affect circulation and drainage, confusing the control unit.
• Excess foam: too much or wrong detergent produces foam that changes water behavior and sensor inputs.
• Drainage problems: a kinked or poorly positioned drain hose, blocked outlet or insufficient drain height impairs outflow.
• Poor load distribution: tall or improperly placed items can block spray arms or change water movement inside the tub.
• Installation issues: hoses that are crushed, forced bends or weak external drainage can prevent normal operation.
• Faulty components: repeating E2 can indicate a tired pump, erratic level sensor, defective flow regulator or an electronic fault.

Related AEG error codes (context)

• E1 – Safety stop: anti-flood protection activated. Suggested: unplug and check for leaks or water in the base.
• E2 – Safety level: water level control triggered. Suggested: stop program, power off, restart and retry.
• E3 – Incorrect heating: water not reaching set temperature. Suggested: rerun and monitor.
• E4 – Temperature monitoring: abnormal thermal reading. Suggested: power cycle and observe.
• E5 – Incorrect water intake: insufficient/irregular inlet. Suggested: check tap, inlet hose and inlet filter.
• E6 – Water pump fault: drainage/recirculation failure. Suggested: inspect drain, siphon and filters.
• E7 – Faulty flow regulator: inaccurate incoming-water measurement. Suggested: restart and recheck.
• E8 – Altered washing distribution: irregular water distribution inside tub. Suggested: restart and inspect washers/arms.
• E9 – Faulty water intake: problem with water inlet. Suggested: request technical assistance if persistent.

What to check at home before calling a technician

• Clean the filters: remove food scraps, grease and sediment; rinse under running water (no abrasives).
• Inspect the drain hose: watch for kinks, tight bends, crushed sections or wrong installation height.
• Check the tub interior: remove broken glass, labels or objects that may block spray arms or filters.
• Verify spray arms and seals: make sure spray arms rotate freely and the door seals and latch work correctly.
• Control detergent dose: avoid excess detergent and unsuitable products that produce foam.
• Look for limescale: heavy deposits can narrow passages and affect sensor response—descale if necessary following manufacturer guidance.
• Check inlet water: confirm the tap is fully open and the inlet hose and filter are free of debris.

When a restart is enough and when to look further

If E2 appears only once and disappears after a reset, it is usually a transient issue: temporary foam, a brief drainage delay or a minor load imbalance. The next wash acts as a practical test.

If the code returns quickly or the cycle always stops at the same point, suspect a persistent anomaly: clogged filters, pump wear, a failing sensor, or electronic faults. Pay attention to accompanying clues such as water retained at the bottom of the tub, poor draining, unusual humming, or undissolved detergent—these help identify the root cause.

When the E2 indicates a real fault

Persistent E2 after cleaning and reset suggests a real hardware or control problem. Possible faults include a defective level sensor, a weak or blocked pump, a faulty flow regulator, or a malfunctioning control board. At this stage, avoid intrusive DIY repairs on electrical or sealed components and consider contacting a qualified technician.

Quick troubleshooting checklist

1. Stop program, power off and wait a few minutes; then restart.
2. Check for water in the base or inside the tub.
3. Clean filters and remove obvious debris.
4. Inspect drain hose routing, inlet hose and connections.
5. Rearrange the load to avoid blocked spray arms and restart a short program.
6. If E2 persists, note accompanying symptoms (noise, retained water, location of stoppage) and contact service.

Tip: If you need more guidance on error meanings, use the free error code finder provided by our site to identify related codes and recommended solutions.