92 Z34 climate control problem

[jazic3.4]

For some reason, my climate control only has 2 options. One is "OFF" and the other is "BLEND"

No other function will work? If I hit AC, defrost, MAX,heat, vent, etc....it will all act like the "BLEND" option (some air coming out of floor and defrost vents). For example, if I hit VENT, it will not come out of the vents, it will stay in the BLEND position. The climate control is not switching between the options?

 

Any Ideas?

[birdman]

you most likley have a vacume leak so check all the lines under the hood.

[jazic3.4]

Where would be a good place to start?

[birdman]

look under the driver side bumper and there will ba a ball thats supposed to have a line going to it. once you fing that line follow it and youll see the rest. check the cruise control lines too.

[White93z34]

first thing, replace the "check valve" its located near the cruise control a little roundish thing with 3 vaccum lines going into it. any auto parts store should carry it.

 

[slick]

I always had problems with my vacuum lines right up near the firewall behind the plenum. Make sure they are all good and connected.

 

Do the check valve, just as Chris said.

 

And, just do a general check to make sure all the lines are still good.

[jazic3.4]

Well I just found out that my Cruise control doesn't work either? The fuse is good so now its gotta be a common problem between the cruise control and the climate control system. Most likely whatever it is....once its found it should fix both issues. It has to be a vacuum issue.