Okay, so here is the saga....
after 3 solenoid boxes (yes 3, I went & got ANOTHER one), 2 climate control dash units, 2 spare vaccum diaphrams, & a very handy piece of hose.....
its fixed!!!
So, we narrowed it down that the dash thingo, is fine.
The solenoid box is working correctly, & using the hose we cycled thru & sucked/blew thru all the valves to check. - Allgood.
So then maybe not getting vaccum in? Checked recently replaced vaccum ball connections, allgood.
CHecked T-Piece has 3 hoses... whoa, one not connected, ah-ha you say? Noooooo, connected said hose, still an issue
Recheck all actuators with the hose.... all of them work....
Back to engine bay, use hose to check vaccum going thru firewall, allgood.
Still why not working?? hmmm, follow all vaccum lines around engine bay, remove engine covers, crawl over manifold....
then sit & think.... did aircon play up before or after new spark leads??? After!!
By feel, find that there is a small nipple for one of the hoses on the t-piece to attach too, guess what? when doing the lead change, have knocked little itty bitty hose off....
for refrence, this hose is located to the right of the dizzy, underneath a larger hose that runs under the dizzy, cant see it, definetly cant take a photo lol
so great drama is finally over, & much dust entered my car after 6mths of no face vents working lols....
(as a side note, I realise that I totally bluffed my way thru regency about the demister.... ha!)