I pulled the console apart today to have alook at the wiring to the radio and cig light: all messed up PO cut and spliced in new radio and such but thats another story.
I pulled out the pass side climate control to have a look at it since it is stuck. The unit seems to be sealed. Where would the underhood valve be located?

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1981 240D 143k 4 spd manual -SOLD

2004 VW Jetta TDI 5 speed 300k -still driven daily