Inherent fault in your microwave ovens
It seems that ALL AEG's built-in microwave ovens exhibit the same fault - they FAIL TO DELIVER THE RATED POWER TO THE TURNTABLE. I tried 3 BRAND-NEW appliances, from the 6000 and 8000 ranges, and they ALL had exactly the same fault.
There's a simple test for this; a poppadum placed on the centre of the turntable will still have a RAW area some 4 cm across in the middle after a minute on full power. My £85 5-year-old Sharp stand-alone device would have burned the poppadum in that time. Neither an earlier Panasonic model nor my current Bosch machine exhibit this fault. A water-heating test - albeit very rough & ready, appeared to show around just 500W of power delivered to a vessel about 3 inches deep when on full - 900W - power.
I repeatedly demonstrated this fault to AEG's staff and I retain photographic proof, but I felt that it was dismissed as a "user issue". The point is, a busy care worker reheating a frozen chicken meal for a dementia patient, or a mum trying to heat baby food, don't usually have time to check everything has been properly cooked; they rely on the appliance instructions and trust that it is working correctly, especially if it's new. If it is not, then the consequences could be catastrophic.
I've suggested AEG investigate & correct this fault as a matter of urgency, and then recall the faulty devices or instigate a refit. This will be very expensive but, I suspect, not as expensive as the lawsuits that will land on their desks if someone dies of salmonella, e-coli or listeria as a result of an AEG microwave oven not working as specified.
One positive outcome of the experience was that, once it was clear that the fault was real, I was able to try a different model (which had the same fault) and then get a full refund. However, on the first occasion, AEG sent an 'engineer' from Pacifica who clearly had no idea how microwave ovens worked - 'Don't they cook from the outside in?' - and on each occasion (4 in total) I had to stay at home all day because AEG refused to give a time-slot, not even AM or PM.