So about a week ago I was playing with my HVAC controls and it doesnt want to switch between bi-level, defrost, etc. Its stuck on defrost sending air through the dash vent. So today I tore apart the dash checking everything and I'm thinking either the bi-level actuator is bad (by the accelerator) or some sort of vacuum issue. I'm leaning heavily toward the actuator. The car has 94,433 miles on it. Just wondering if anyone's had this problem or any tips/advice to fix the problem.

Thanks

EDIT: I found this thread, approx a month or so old. If anyone could elaborate, link me to an old thread or give more feedback, that would be great.

 

check the vacuum check valve under the hood first

http://shbox.com/1/vac_check_valve.jpg

 

I just got in from checking it out (saw that thread). Is there any way to test the check valve or is it replace and pray? lol

 

http://shbox.com/1/4th_gen_tech2.html#HVAC_vacuum

 

Dave you're my hero for today. Appreciate it.