AEG washer-dryer error E90: electronic configuration or communication fault

Does this guide apply to your appliance?

Match the brand, device type and complete display code. The same code can mean something different on another product family or market; a series name does not confirm every model in that series.

Model and family references in this record:

AEG freestanding washer-dryerAEG integrated washer-dryerAEG washer dryer

Likely causes

A communication or configuration problem in the electronic system; exact component diagnosis requires model-specific service checks.

What to try

One manufacturer-recommended reset

Easy

Switch the appliance off. Disconnect power only if the plug or isolator can be reached safely and there is no water or visible electrical damage.
Leave it disconnected for 30–60 seconds, then reconnect power.
Check whether the warning has cleared. If it remains or returns, record the full code and arrange authorized service; do not keep repeating resets.

This step is marked caution. Stop if you are not qualified to continue.

Source for this check: support.aeg.co.uk

Arrange model-specific electronic diagnosis

Professional

This is a service referral, not a do-it-yourself repair procedure.

Record the complete model number and product number from an accessible rating label; do not remove panels to find it.
Tell the service provider the exact code and what happened after the reset.
Leave opening, programming and replacing electronic modules to a qualified service technician.

This step is marked professional. Stop if you are not qualified to continue.

Source for this check: support.aeg.co.uk

The code returned or the check did not help?

Avoid repeated resets and do not select a replacement part from the code alone. Record the exact code, full model number, when it appeared, and the checks you tried with their results. Share these details with the manufacturer or service technician.

Disconnecting power does not establish that internal components are safe to touch. This guide does not authorize opening electrical components or bypassing safety devices.