Seams to be a lot of steam/ vapour in main oven. when you open door cluds of steam escape. This is the 4000 twinline all electric model.

manufacturer or an appliance shop for your request

possibly bad door seal

The first thing I'd suspect is a poorly fitting door seal / gasket. This will permit the heat inside the oven to escape. Check to be sure the the one installed is defective (cut, split, frayed, dislodged, etc.) Replacement parts:
http://www.appliancepartspros.com/whirlpool-gasket-door-w10074200-ap3892420.html

Make sure this is the part you need before ordering.

you may find there is some insulating material missing internally as I would imagine steam affecting the front of the control panel

sounds like door seal to me

Sounds like the oven door hinges have worn. If door is not obstructed in any way and will fully close when pushed but open about half a inch when released then it will be the hinges. Not sure of cost of spairs. I believe this to be a John Lewis Model. If it has a Enr no inside the door or inbetween the door hinges then I could give you price on spares

You are right in thinking it is the door hinges that is the cause of the problem .they are non adjustable, so only solution is to replace both hinges.
Plz rate my solution.
Thanks.

The door is v heavy and the hinges being right at the bottom take a lot of strain, especially when the door is in 'half open' position. Once the springs start to wear the hinges are no longer strong enough to hold the top of the door firmly closed. Our U1661 is 8 years old and we've had the hinges replaced twice under extended warranty. The second time the hinges they supplied don't hold the door in this position and it will just drop straight down if you don't support it while you open it.

I am pretty sure this is just the steam escaping. Smeg ovens seal so evenly that the steam stays in the oven.

it sounds like the thermal cut out is broken can be replaced quiet easy need to disconnect oven from mains remove outer cover and has four wires two blue two white all with spade connectors can be bought from e spares on the web