PartsCompat UK

C3

Error code

high severity AEG

C3: Leak Protection Active

You've noticed the C3 error code flashing on your AEG dishwasher display, and understandably, you're concerned. This error means your dishwasher has detected water pooling at the base of the appliance and has activated its leak protection system to prevent damage.

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Diagnostic Steps

  1. 1

    Step 1

    Close the water tap immediately

  2. 2

    Step 2

    Switch off power

  3. 3

    Step 3

    Inspect hoses and door seal

  4. 4

    Step 4

    Contact a technician — do not use until leak is resolved

⚠️ Always disconnect your appliance from mains power before starting any repair. If in doubt, consult a qualified engineer.

Parts to Check in order of probability

1
seals medium

Door Gasket

OEM: 140055636017

Is water pooling around your dishwasher door or escaping during the wash cycle? A worn door gasket is likely the culprit. Over time, the rubber seal deteriorates from repeated opening and closing, losing its ability to create a watertight barrier and allowing water to leak onto your kitchen floor. This genuine AEG door gasket (OEM reference 140055636017) restores a proper seal between the door and tub, eliminating leaks and preventing water damage to your kitchen. Replacing it is straightforward, making it an ideal DIY repair for most homeowners. Installation is rated difficulty level 2, typically taking less than an hour. The most important tip is to ensure the gasket sits evenly in its groove all the way around before closing the door. Uneven seating is the most common cause of continued leaks after replacement. The gasket slots into the channel around your dishwasher's inner door frame, and removal simply requires gentle prying to release the old seal. Before ordering, verify your appliance's E-Nr model number on the rating plate inside the door frame to confirm compatibility with your specific AEG dishwasher model.
2
door_parts medium

Slider, Sliding Panel, Plastic

OEM: 1174143014

If your dishwasher door isn't gliding smoothly or feels stiff when opening and closing, a worn plastic slider could be the culprit. Over time, these small but essential components wear down through repeated use, causing friction and difficulty operating your appliance. This genuine AEG replacement slider (OEM reference 1174143014) restores smooth door operation and prevents further damage to your dishwasher's hinges and frame. It's a straightforward fix rated at difficulty level 2, making it ideal for confident DIY homeowners tackling basic appliance repairs. Before installing, take a moment to clean away any debris or hardened detergent residue from the door track. This simple step ensures your new slider seats properly and functions smoothly from day one, potentially extending its lifespan significantly. The repair typically takes 10-15 minutes with basic tools. Most users find the slider clips securely into place without complications. Please verify your dishwasher's E-Nr model number matches our compatibility information before ordering. You'll find this on the manufacturer's plate inside your appliance.
3
door_parts medium

Screen, Sump

OEM: 140073097010

When your AEG dishwasher isn't draining properly or you've noticed water pooling at the bottom, a worn or damaged sump screen is often the culprit. This component prevents debris from blocking the drain system, and over time it can become clogged or crack from general wear and failure. Replacing your sump screen is a straightforward job that most DIY homeowners can tackle in under an hour. The part reference 140073097010 is the genuine OEM component designed specifically for AEG dishwashers, ensuring perfect compatibility and reliable performance. Installation difficulty is rated at level 2, meaning you'll need basic tools and a bit of patience, but no specialist knowledge required. Before you start, take a photo of the existing part to familiarise yourself with its position. This handy tip makes reassembly much easier. The sump screen sits in the door assembly area, filtering water before it exits the machine. Once installed, your dishwasher should drain efficiently again. Always verify your appliance's E-Nr model number before ordering to guarantee this part is compatible with your specific AEG dishwasher model.
4
door_parts medium

Door Outer Panel,zinc-plated,insulating Mat,[590mm]

OEM: 140217280019

If your AEG dishwasher door is looking worn, damaged, or no longer seals properly, a deteriorated outer panel could be the culprit. This replacement door outer panel restores both the appearance and functionality of your appliance, ensuring a proper seal that prevents water leaks and maintains washing performance. This genuine zinc-plated panel features an integrated insulating mat that helps regulate temperature and reduce noise during operation. It's a straightforward replacement job rated at difficulty level 2, making it manageable for most home DIYers with basic tools. When you're ready to install, remember to support the door fully with one hand whilst removing the old panel, as it's heavier than it appears. This prevents strain on the hinges and makes the job safer and easier. The OEM reference number 140217280019 ensures you're getting the exact part your dishwasher needs. Before placing your order, always verify your appliance's E-Nr model number matches this part's compatibility, as AEG produced several door sizes across their range. This simple check prevents ordering errors and unnecessary returns.
5
door_parts medium

Template, Door Panel, Fully Integrated,

OEM: 140237833193

If your dishwasher door isn't closing properly or the panel looks worn and damaged, a faulty door template could be the culprit. This fully integrated door panel replacement restores your AEG dishwasher to full working order and gives it a refreshed appearance. The template houses crucial components that keep your door functioning smoothly. Over time, general wear and tear can cause it to crack, warp, or fail completely, leaving you with an appliance that won't seal properly. Replacing it is straightforward and typically takes just an hour or two. Installation difficulty is rated at level 2, meaning it's quite manageable for a confident DIY homeowner. Our top tip: before you start, take photos of how the old panel connects and remove all fasteners carefully to avoid damaging surrounding components. This helps reassembly go smoothly. The OEM reference 140237833193 ensures you're getting the exact genuine part your dishwasher needs. Always verify your appliance's E-Nr model number before ordering to guarantee compatibility with your specific AEG dishwasher model.

Frequently Asked Questions

What does the C3 error mean on a AEG dishwasher?↓
You've noticed the C3 error code flashing on your AEG dishwasher display, and understandably, you're concerned. This error means your dishwasher has detected water pooling at the base of the appliance and has activated its leak protection system to prevent damage. Whilst this sounds serious, it's actually your dishwasher doing its job by shutting down before the problem escalates. The good news is that many C3 faults can be resolved without calling out an engineer, saving you both time and money. Water leaks typically stem from a few common culprits that are often accessible and replaceable. The most likely components to investigate are the door seal, which may have deteriorated or become misaligned, the pump seal, which can wear over time, or the hose connections, which might have loosened or cracked. Additionally, the spray arm seals or the sump area beneath the filter could be responsible. Before you panic or reach for your phone, this guide will walk you through diagnosing the problem and identifying which component needs attention. Many of these parts are straightforward to replace, and you may be able to get your dishwasher running again without professional help.
Can I fix the C3 error myself?↓
Many C3 faults can be resolved by a competent DIYer. Always disconnect from mains power first. If unsure, consult a qualified engineer.

Quick Summary

Code
C3
Brand
AEG
Parts to check
5