Scotts98

98 Camaro, the hot/cold controls are giving me trouble. fan works fine, but when I switch vent/floor/defrost either it won't switch between or it will take its sweet time. Also if I have it set to floor, air is coming out vent/defrost too.
If I set the fan on high and vent, when I step on the gas all the air comes out the floor instead of vent, then when I let off the gas blower changes back to vent again. This is the weirdest thing ever seen in a car. Could it be my heater/AC controls, or maybe whatever moving flaps the controls work to switch from floor to vent? The controls must send a signal to a solenoid or something to physically move something in the vent system that redirects the air? I don't want to spend money troubleshooting where I'm not sure the cause. HELP!

NonGoggleGuy

Start with the electronic parts first. I would go to a junk yard or eBay & try to find a used heater & AC controller (just to troubleshoot). When the controllers go bad, they "default" to the defrost position as a safety feature.

If a new controller doesn't do it, start digging into the vacuums that move the vents.

samson_420

iTrader: (1)

You either have a vacuum leak in the AC control system(typicaly at the elbow by the PCM).

Or, your AC controls are jacked.


I would say the first.

Scotts98

OK I'll take a look at that this weekend.

Scotts98

Didn't find anything obvious in AC system, I'm gonna get a cheap HVAC control and see what that does. I'll keep y'all posted...