i saw what you did there!
Join Date: Sep 2002
Location: Lincoln IL
fast68chevy is offline
Re: defrost and vents not working for a/c and heat...
make sure that the vacuum hose under the hood that runs to the passenger side to the heater system through the firewall is connected to the intake manifold vacuum still
this is main vacuum source to the heater control panel
and positions will not change without it
if its connected then the door in the heater box may be stuck
or the panel switch may be broken
or the actuator may be bad yes
most of the time its the vacuum hose thats not connected under the hood though
many different vehicles parting out, engine underhood dash electrical and more parts! cars, trucks, fords, chevies, etc. - text me 217 671 7792 anytime! Own: '54 F350 dually, '54 & '57 F100's, '57 Bel Air gasser, '68 Corvair Monza 'vert. '72 Chevelle SS HT, '82 K10 SF, '85 Elky SS 310ci, '93 C1500 4.3L Z