hvac issue...please help.
Hey guys, Im new to this site. very helpful site I may add. My girlfriend has a 98 bonneville with like 238k miles on it. I've been trying to keep up on it so it doesn't break down on her. anyway, she is having a lot of hvac issues with the car.
First issue that started was this past winter. at any random given time the heater would not work when she first turned on the car. Usually after about 10-25 mins after the car being on, the heater would finally kick on. After making it through winter with this issue, summer time came. The same type of deal was happening with the AC, accept when it actually turned on I noticed it was only coming out the defrost and floor vents. After reading around on this forum I found out about the vacuum leak from the "collapsing nipples". I spent a few hours 1 saturday dealing with this issue and was able to fix it. the AC started blowing out the vents!!!....
...After about a week or 2 of fixing the vacuum leak I noticed that when the AC was on high, it would randomly loose flow through the vents. I manually turned the fan from high to low then back up to high and that would fix that issue for a little bit. But it continued to do this and I would have to manually turn the fan from high to low and back to high...
...after about a week of this my girlfriend tells me that the AC has completely stopped working, so today I was in her car and I started playing around with the controls. I turned on the AC while car was on, and I could hear everything clicking and engaging (atleast thats what it sounded like to me). but no air was coming out of any vents what so ever. tried turning controls up and down, high and low, but nothing I did would allow any air flow at all....
I have been reading around about other peoples issues with hvac, but haven't seen any issues exacally like this one...My first thought is the motor...or maybe some sort of switch, I know quite abit about cars, but have never messed with automatic climate control system.
SO...after you read this long book, if you have any suggestions at all I would appreicate it ALOT...also if you suggest something, please give me a little more detail than "check motor" or "check switch"...I wouldn't know how to check things like that without an explanation..
Thanks a lot for your time!