function GetCookie (name) { var arg = name + "="; var alen = arg.length; var clen = document.cookie.length; var i = 0; while (i 2) ? argv[2] : null; var path = (argc > 3) ? argv[3] : null; var domain = (argc > 4) ? argv[4] : null; var secure = (argc > 5) ? argv[5] : false; document.cookie = name + "=" + escape (value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + ((path == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : ""); } function getCookieVal(offset) {var endstr = document.cookie.indexOf (";", offset); if (endstr == -1) endstr = document.cookie.length; return unescape(document.cookie.substring(offset, endstr)); } function returnObjById( id ) { if (document.getElementById) var returnVar = document.getElementById(id); else if (document.all) var returnVar = document.all[id]; else if (document.layers) var returnVar = document.layers[id]; return returnVar; } function GetCookie (name) { var arg = name + "="; var alen = arg.length; var clen = document.cookie.length; var i = 0; while (i 2) ? argv[2] : null; var path = (argc > 3) ? argv[3] : null; var domain = (argc > 4) ? argv[4] : null; var secure = (argc > 5) ? argv[5] : false; document.cookie = name + "=" + escape (value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + ((path == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : ""); } function getCookieVal(offset) {var endstr = document.cookie.indexOf (";", offset); if (endstr == -1) endstr = document.cookie.length; return unescape(document.cookie.substring(offset, endstr)); } function returnObjById( id ) { if (document.getElementById) var returnVar = document.getElementById(id); else if (document.all) var returnVar = document.all[id]; else if (document.layers) var returnVar = document.layers[id]; return returnVar; }AC works fine. AC fan is on. AUTO AC works, however cold air runs only through windshield and leg vents. No flow through MID. When AC is not on, the same. Air flow button does not change anything. There are fuses behind glove compartment. Is there a blown fuse somewhere?
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I have the same problem. I think controller unit (behind glove box)is bad. Vacuum runs into it (one tube,connected to the engine vacuum), no vacuum out of it (four tubes). Fuse for the unit is o.k. (right hand side, behind glove box, hidden behind white plastic bracket). Open the bottom plastic cover below the glove box for easy access. On this cover there is a label shoving fuses functions). If the fuse is bad, replace, problem solved. If not you have to find a junk car and replace controller unit.
In your case, if the controller fuse is o.k., first check (with engine running)the vacuum source by opening (gently) pink connector between engine vacuum (black hose) and harness hose (violet). If there is a hissing sound and light suction, next try to change settings at the programmer display, at the same time hold by hand harness that holds all 5 vacuum tubes at the controller unit. You should feel muted sound and feeling under the fingers that controller is changing vacuum direction.
Stupid GM cars.
First, rise up and secure left front side of the car. Look up under the bumper and the left fender there is a small vacuum tank. At the front side on it, there is a connector attached to the plastic vacuum hose. If your car is over 10 years old, most likely connector is broken. Buy a small piece of the 3/16 rubber hose (NAPA...) Connect a vacuum hose and the tank nipple. AC should work like before.
I had a same problem, I checked fuses (behind the glove box), replaced disply unit (dual air, automatic), replaced programmer with all vacuum hoses (do not ask about bruises on my hands and my frustration). Nothing happened. Then I figured out solution above. You should get better millage, too.
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