ac issue
Thread Starter
Instructor
Joined: Mar 2005
Posts: 184
Likes: 1
ac issue
So for a few weeks I have been getting a hissing noise that seems to be coming from somewhere just inside the dash. It started after the first few times I put on the A/C this spring. Now, not only do I have a constant hiss, with the A/C on or off, but also when the A/C is on, and I turn my car to the left, it sounds like someone is pouring sand underneath the passenger side of my car. I know that is a weird explanation, but that is exactly what it sounds like. Everytime I have the A/C on and make a left turn, it sounds like I'm running over dirt or sand on the passenger side of my car. Very very weird.
Burning Brakes
Joined: Dec 2003
Posts: 1,066
Likes: 9
From: Eddy Texas
+
Do you have any codes?
Are all of your mode settings working correctly? Is the air blowing where it should be? The hissing sounds like a vacuum leak. If so, you should be having issues with airflow from the proper vents. As for the "sand" sound, hard to say.
Thread Starter
Instructor
Joined: Mar 2005
Posts: 184
Likes: 1
Pro
Joined: Sep 2007
Posts: 735
Likes: 7
From: Bucks County Pa
AC Hissing Noise
Hi, this is tough to pin down without symptoms other than a hissing noise. You can have a small vacuum leak and the components still work ok. But here are a few places to look or listen closely to.
1, The Vacuum control assembly is located on the passenger side lower dash area behind the insulator pad.
2, The Mode actuator is located behind the guage cluster area.
3, The Defroster actuator is located in the upper dash behind glove box.
4, The Vacuum source is located on the back of the manifold
5, The Vacuum Tank is located under the battery box down by the wheel well.
It would be a good idea to look at the connection on the back of the manifold, because this has been a problem for some. And take a good look under the battery box for acid damage to lines, or the tank.
The above is assuming that it is a vacuum leak that you are hearing. See if you can pinpoint the sound more precisely and let us know.
Good Luck
1, The Vacuum control assembly is located on the passenger side lower dash area behind the insulator pad.
2, The Mode actuator is located behind the guage cluster area.
3, The Defroster actuator is located in the upper dash behind glove box.
4, The Vacuum source is located on the back of the manifold
5, The Vacuum Tank is located under the battery box down by the wheel well.
It would be a good idea to look at the connection on the back of the manifold, because this has been a problem for some. And take a good look under the battery box for acid damage to lines, or the tank.
The above is assuming that it is a vacuum leak that you are hearing. See if you can pinpoint the sound more precisely and let us know.
Good Luck
Last edited by bestvettever; Jun 11, 2008 at 10:36 PM.
