replaced all my vac lines....checked behind the glove compartment at the vac lines...all good....im stumped..any ideas

i have ac blowing thru the defroster only

Digital or analog type climate control?

The only time I've had the ac only blow out of defrost is when a vac line came loose behind the glove compartment.

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1985 N/A Z31 5 speed 2+2-burgundy exterior and interior.

MY Z31

"RIP ol' red she didn't make it after the wreck, she died at the scene on 8-8-08"

Just a thought:

Do you have that tiny button at the top of your climate control panel that switches the vents to like an emergency defrost mode? And did you maybe accidentally hit that button? Sometimes the plastic finish flashing around that console will sag and obscure that button.



Edited 1 time(s). Last edit was 2009:06:23:08:17:32.

its digital and i will check close on that button...

behind the glove compartment i found a three way vaccum connector....all lines connected

thanks

Thats what happened when the sensor/fan in the headliner failed. Maybe thats the problem.

i was told by the local z shop that defrost is the default mode/position if any problem exists in the circuit...mine turned out to be a broken vac line under the hood, right where it came out of the firewall. if i am not mistaken, that is the main source of vac to shift the ducts. it is also one of three going up front to the canister. they all get pretty dry, so i just started replacing them all one at a time, and got improvement each time. you didnt mention if the heat is the same way. i assume it is.

I have the digital climate control as well.
Check this line: Linky
There is a self diagnositc for the climate control in the FSM.
Double check the connectors that run to the back of the unit to make sure
they are in tight.
If all the lines and wiring are fine, you might have to change out the unit.