AEG E90 fault codewhat it means and how to fix it
An internal communication failure between the machine’s electronic parts. Notable because AEG print this code in the manual and their own support site has never heard of it.
Take care
What E90 means
This code has an odd status. It appears in the error table of the manual that came with your machine, described as "Internal fail. No communication between electronic elements of the appliance," with the explanation that "the programme was not finished properly or the appliance stoped too early" — AEG’s typing error, not ours. And yet search AEG’s own support site for E90 and you get nothing.
There is no article for it, nor for E91, which the manual treats as the same fault. So an owner who reads the code off the display, looks it up on the manufacturer’s website, and finds nothing is not doing it wrong; the manufacturer has simply not written the page. What it means is that the control board and one of the other electronic assemblies in the machine have stopped talking to each other.
The manual’s remedy is the most basic one available — switch off and on again — and its escalation is the service centre. Behind the family sit configuration faults: an error in how the appliance is set up, an error in the configuration of the drying cycle, and a mismatch between the programme selector and the cycles the board believes it has. Those are not things an owner can address, but they do explain why a power cycle sometimes clears it and sometimes does not.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| The cycle was interrupted part way through | AEG’s own explanation is that the programme did not finish properly or the machine stopped too early. A power cut, a plug pulled mid-cycle or a tripped breaker can leave the electronics out of step with each other. | Common |
| A configuration error in the appliance or the cycle | The family covers faults where the board’s stored configuration does not match the machine it is fitted to, or the cycle data it holds is inconsistent. This is common after a board has been replaced and not set up correctly. | Occasional |
| A mismatch between the programme selector and the board | The board expects the selector to report one of a known set of positions. When what arrives does not match, the two are effectively speaking different languages and the machine stops rather than guessing. | Occasional |
| A failed connection or a failing board | A loose or corroded connector between assemblies produces exactly the same symptom as a failed board, and in a machine that vibrates for hours at a time, connections do work loose. Only an engineer can separate the two. | Occasional |
What to try yourself
Take the load out and spread it to cool before doing anything else, since you are about to switch the machine off part way through a cycle.
AEG’s manual is explicit that a dryer should never be stopped mid-cycle unless the washing is removed and spread out so the heat dissipates. Their reset advice does not mention it. Ours does.Switch the machine off at its own switch, then off at the wall, and leave it for a minute rather than a few seconds.
Switch back on and select a short programme. AEG’s entire published remedy for this code is "Switch the appliance off and on again", so this is the manufacturer’s fix rather than folklore.
If the machine runs normally, note whether the previous cycle was interrupted — by a power cut, a trip, or someone pulling the plug — because that is the usual trigger and it explains a one-off.
If E90 or E91 returns, stop. The manual’s own escalation is the service centre, and there is nothing further an owner can reach on this fault.
Get a qualified appliance engineer to look at your AEG E90
We do not pass enquiries to a repair firm, so there is no form here. When you book a qualified appliance engineer, tell them the make, the model and the exact code or message on the display, and ask whether they carry parts for this make — that is what turns one visit into a repair rather than a quote.
What it costs to fix
Typical repair cost
£0–£260
Time on site
10 minutes
Nothing if a power cycle clears it, which for an interrupted cycle it often will. A control board is the other outcome and is usually the point at which an older machine is not worth repairing. AEG stock printed circuit boards for at least ten years after a model is discontinued.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Own this appliance and had this code? . Nothing is published until a person has read it.
Related AEG fault codes
- E70Stop — call an engineerThe dryer has lost the ability to measure its own temperature. AEG tell you to unplug it for two hours and not to use it until it is fixed.Related: sensors and control
- C6Get it checkedThe moisture sensor is not reporting properly, and AEG give a specific symptom: the cycle runs on past four and a half hours instead of finishing.Related: sensors and control
- EH0Usually simple to fixNot a fault in the dryer at all. AEG are reporting that the electricity reaching the machine is unstable, or the voltage is outside what it will accept.Related: sensors and control
- E80Get it checkedThe machine cannot tell which programme you have chosen. AEG’s first suggestion is the one worth trying: check the dial is not parked between two settings.Related: sensors and control
- CEStop — call an engineerA fault in the electronics. AEG tell you to unplug the machine and not to plug it back in until you are sure it is safe, and they publish no owner checks at all.Related: sensors and control
- E50Get it checkedAEG’s support site calls this a motor or software fault and sends you to an engineer. AEG’s own manual says it is usually just too much washing in the drum.Related: same brand
Own an AEG tumble dryer? Save it and its codes come first next time.
Related guides
Common questions about AEG E90
Why is there nothing about E90 on AEG’s website?
We do not know, and it is a genuine gap rather than a search problem. AEG publish tumble dryer support articles for around fifteen codes and E90 and E91 are not among them, despite both being printed in the error table of the manual supplied with current machines. One trap: AEG do publish a "Washer dryer displays error message E90, E91, E92, E93 or E94" article. That is for washer-dryers, a different appliance with a different code set, and it does not apply to a tumble dryer. If you looked and found only that, this is why.
Is E91 different from E90?
Not according to AEG. Their manual lists them on a single row, "E90 or E91", with one description and one remedy. Whatever distinguishes them is not something they have chosen to tell owners.
Can a power cut cause this?
It is the likeliest trigger. AEG’s wording is that the programme was not finished properly or the machine stopped too early, and a power cut mid-cycle is exactly that. If yours followed one, a full power cycle stands a good chance of clearing it.
The machine shows no code at all but behaves oddly.
That is possible on these machines and it is by design. The service documentation records that certain alarms are not shown to owners, and that which ones are hidden is configurable per model. So a real fault producing no code is not a contradiction, though it does mean guessing is pointless.
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer technical and service documentation
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.