To anyone reading the thread and wondering what was wrong with the second appliance…. it is devoid of gas. It seems as if I’ve been just very unlucky to have 2 faulty brand new appliances (with different faults). It has rather put me off AEG though, rightly or wrongly …..
Thank you for the reply. The first one was allowed to settle, the second one was turned on after installation as the fitters assured me that as it had been standing for several hours, it would be fine.