Ignition switch?

[94grandprix]

I've tried everything for my HVAC,my vents just will not change,could my ignition switch be problem,has anyone else experienced that problem with a bad switch

[chris99gtp]

Yeah. blower would work on 1 or 5 only. Changed the Switch and it worked

[94grandprix]

Mine blows on all,mines digital but just won't change to feet,defrost or other vents,could a bad switch cause this

[Scottydoggs]

vac line from the top of the sc to the fire could be broken.

change the battery lately? that same line runs near the battery,

[94grandprix]

I've already bypassed it,took the line off my 00 and ran it from the sc and temporarily through the door to try it and nothing,now my little hook to my blend door actuator to the passenger side broke,gotta figure out how to get that off,I've tested my vent actuator that runs off vac on my 00 works great,bough another vac line solenoid,worked for a day then quit,tested it in my 00 works great,running out of options

[94grandprix]

Also I've seen only 97 and 98 work then 97-00 then 97-03 so which is which and one has a econ button,is that the same as ac?

[EJohnson]

I had the same problem with my 2003. The blower control only worked on 1 and 5. Also, when this began happening, the headlights would not automatically turn on when dark. Checked the fuse block with a multi-tester and narrowed the problem to the ignition switch. I actually dismantled the switch - I found a tutorial online showing how to dismantle and reassemble it. Half the contacts were carboned-up. I cleaned the contacts with a small brass brush and Radio Shack contact cleaner. The ignition switch is really poorly designed. Instead of self-wiping rotary contacts there are approximately six sets of contacts (six separate switches) that are opened or closed depending on the position of the ignition key. As each set of contacts opens or closes, there must be some arcing that causes the contacts to carbon up.