Help with Air Conditioning
Melting Slicks
Joined: Jul 2006
Posts: 2,332
Likes: 31
From: Silver Spring MD
Vacuum Line for blowing out of all ducts
Wrote extensive post on how to fix this. Basically replace deteriorated sections of hard line with winshield washer hose. Check valve is inside right front fender, Accessable from below. Just take out 2 or 3 screws and get up inside fender. This will fix the vacuum problem. Look on previous posts or archives. Lots of posts on battery acid causing vacuum and other problems. Wash under battery tray with baking soda and warm water then rince and dry. Paint any exposed metal to prevent rust. Lots of fun.!!!!!
BIGHANK
BIGHANK
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
BC
Burning Brakes
Joined: Aug 2010
Posts: 930
Likes: 13
From: Aiken SC
C5JOSH
When you have the "ALL AIR COMES OUT OF DEFROST ISSUE" it normally means that you have lost vacuum to the AC/heat cotrols. The vacuum signal come from behind the intake manifold (BOY IS IT A BITCH TO GET TO), goes under the battery tray (if you have ever had a battery acid leakage issue the vacuum line is the FIRST to go) and then into the passengers compartment to the air box controller.
Rscommend that you make sure that the vacuum line behind the manifold is properlt connected and then check the line all the way to the fire wall. The vacum line enters the passengers foot well area through the LARGE wiring harness fire wall pass through hole.
BC
When you have the "ALL AIR COMES OUT OF DEFROST ISSUE" it normally means that you have lost vacuum to the AC/heat cotrols. The vacuum signal come from behind the intake manifold (BOY IS IT A BITCH TO GET TO), goes under the battery tray (if you have ever had a battery acid leakage issue the vacuum line is the FIRST to go) and then into the passengers compartment to the air box controller.
Rscommend that you make sure that the vacuum line behind the manifold is properlt connected and then check the line all the way to the fire wall. The vacum line enters the passengers foot well area through the LARGE wiring harness fire wall pass through hole.
BC
The vacumn hose at the rear of the manifold had broken. replaced it, everything fine now. Listen to BC, this guy knows his stuff.
