Feet vents
 

Having driven in the recent nippy weather it came to my notice that the feet vents only appear to be blowing cool? Not outdoor cold but definitely not warm (my trotters were dreadfully chilly) and much colder than either the dash or screen vents which seem to be at the requested temperature. Anything obvious to check before I start crawling under the dash?

It boggles my mind how the D2 manages to blow different temperatures from different vents when it mechanically does not have the ability to do that http://www.corradov8.com/pics/banghead.gif
Centre vent excluded of course - that's a whole load of problems in itself!

Mine blows roasting hot from the driver's side dash and floor vents but the requested temperature from the windscreen. It only has temperature control in the heater cores so how does it blow two different temperatures at once? http://www.corradov8.com/pics/screwy.gif

One of my projects this year is to figure out how this arcane and frustrating system actually works so I can stand a chance of fixing it! I have a complete hvac system out of the car so I can study it in detail, and part of the project is redesigning the valve block.