AEG Dishwasher: anti-flood sensor tripping

Professional Repair Guide

What is this symptom?

Is your AEG dishwasher displaying an anti-flood error code i30? This issue often leads to continuous draining and prevents normal operation, as the anti-flood device detects water in the base tray. Understanding the root causes can help you resolve this frustrating problem and restore functionality to your appliance.

Urgency: Medium

Important Tips for AEG Models

Error code i30 corresponds specifically to anti‑flood protection triggered (water in base) on AEG dishwashers

Possible Causes

Water accumulation in base tray activating anti‑flood sensor

How to Identify: Error code i30 displayed; constant drain pump operation; water visible in base tray after removing bottom panel

Part: Anti‑flood float/pressure switch assembly and base tray

Internal leak (hose, seal, pump) allowing water into lower pan

How to Identify: Moisture under dishwasher or inside base tray without obvious filter blockage; error persists after removing water

Part: Hoses, seals, pump gaskets

Clogged or impaired drain/pressure switch duct causing false flood detection

How to Identify: No actual water in base after drying but sensor still triggers; debris observed in pressure switch tube

Part: Pressure switch/duct to base sensor

Over‑foaming leading to water entering base

How to Identify: Excess suds during cycle; anti‑flood error sometimes follows heavy foaming episodes

Part: Foam/overfill from excessive detergent or wrong detergent

Faulty anti‑flood sensor or wiring fault

How to Identify: No visible leaks or blockages; sensor fails repeatedly after drying and inspection

Part: Anti‑flood sensor or control wiring

DIY Solutions

Drain water from base tray and reset sensor

Moderate 15–30 minutes

Tools Needed: towels or sponge, flathead screwdriver to remove bottom panel

Turn off and unplug dishwasher.
Remove bottom access panel and use towels/sponges to soak up water in base tray.
Tilt dishwasher slightly backward to drain residual water if accessible.
Ensure base tray is completely dry, then reassemble panel and power on.
Run a short cycle to check if anti‑flood error clears.

⚠️ Safety First: Always unplug appliance before accessing internal areas.

Clean drain path and pressure switch duct

Advanced 30–60 minutes

Tools Needed: syringe or narrow tube, screwdriver to access component areas

Power off and unplug dishwasher.
Access the pressure switch and its small duct tubing (may require partial disassembly).
Use a syringe with flexible tube to flush debris from the duct.
Check that the float/pressure switch moves freely.
Reassemble and test dishwasher operation.

⚠️ Safety First: Take care not to damage small tubing or connectors.

Check and clear spray arms, filters to reduce over‑foaming risk

Easy 10–15 minutes

Tools Needed: No special tools

Remove and clean filters and spray arms under running water.
Ensure correct detergent type and dosage to avoid suds.
Replace components and run a rinse cycle to observe behavior.

Next step

Choose the next step for anti-flood sensor tripping

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

Pressure Switch

Detects the water level inside the tub and signals when to start or stop filling.

Typical part-only price: $25 - $65
DIY difficulty: Easy
Estimated time: 15-30 mins

Optional: enter your model number

Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other components that may be involved

Check these only if your diagnosis points to them.

Possible related component

Float Switch

Detects the maximum water level to prevent overflow and potential flooding.

$15 - $40 · Easy · 10-20 mins

Check fit & price

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Professional Repairs

Replace faulty hoses, seals or pump gaskets

Estimated Cost: $80 - $250

Replace anti‑flood sensor or associated wiring

Estimated Cost: $60 - $180

When to Call a Professional

Leaks found in internal hoses or seals

Anti‑flood error persists after drying base and checking filters

Uncertain about safely accessing internal parts or if wiring issues suspected

Preventive Maintenance

Regularly clean filters and spray arms: Blockages that can contribute to over‑foaming and drainage issues
Frequency: monthly
Inspect hoses and seals annually: Internal leaks that may trigger flood sensor
Frequency: annually

Frequently Asked Questions

Why is my AEG Dishwasher anti-flood sensor tripping?

Common causes include water accumulation in the base tray, internal leaks, or clogged ducts.

How do I fix AEG Dishwasher anti-flood sensor tripping myself?

You can drain the base tray, clean the drain path, or check filters to resolve the issue.

How much does it cost to fix anti-flood sensor tripping?

Professional repairs typically cost between $60 and $250, depending on the issue.

When should I call a technician for anti-flood sensor tripping?

If DIY solutions do not resolve the problem, or if you suspect a faulty component, contact a technician.

References & Sources

Dishwasher displays error message i30, drains constantly Official

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

75%

DIY Success Rate Difficulty: DIY

Common Issues Reported by Users

Blocked or damaged drain hose causing water to back up and trigger the anti-flood sensor.
Faulty anti-flood sensor or float switch malfunctioning, leading to false alarms.
Leaking seals or gaskets within the dishwasher, allowing water to escape and activate the sensor.

User Suggested Solutions

Inspect the drain hose for kinks or blockages. Disconnect the hose and clean it thoroughly. Ensure it is properly positioned and not submerged in water.
Test the anti-flood sensor and float switch for proper operation. If faulty, replace the sensor or switch according to the manufacturer's instructions.
Check all seals and gaskets for wear or damage. Replace any faulty parts to prevent leaks that could trigger the sensor.