Hi, im restoring my 88 Iroc-z. Im having a problem with the heater control panel. The problem is that i hear the blower motor working but when i switch to heat nothing comes out of the vents? I tried to switch to lo, fan, med, then High but really nothing. I was wondering if there is some sort of duct or door that opens and closes, thow i might add that the cable swtiches to cool or heat with no problem but still no heat, I feel it very faint in the defroster part. any help will be greatly appreciated. thanks guys. Oh, i forgot to also mention that whatever i switch to whether its normal vent, vent, or defroster...i get nothing.

 

well this is just my 2 cents but maybe something is blocking the cowl, look down inside there for crap. there is a door that the one lever works but i think that regardless if that works or not you should at least feel air coming through the vents

 

I'd also check the control panel too... it's easy to accidently pull a line off the back.