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Author Topic: A/C vacuuom line ? mustanggt5091 All I need is..... Member # 444 posted                              The line vacuuom line that comes off the tree and goes into the firewall( where the heater core hoses come out ), is that the vacuuom line that opens and closes the vent? DO I need it to keep my defrost working? -------------------- 88 GT 357w (SOLD):( 06 Limited Edition R6 !!!!! Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001  |  : JohnB Tech Moderator Member # 969 posted                              Yup, the AC control panel runs strictly off of vaccum. If you want it to work, ya better hook it up. -------------------- 1965 Shelby Cobra 1993 Cobra 2012 F150 Raptor 2020 GT500 Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002  |  : 4RS FED ¯ Member # 2067 posted                                 depends do you only want defrost or you want vent and floor?? if only defrost it does NOT need any vacuum if you want the other settings it needs vacuum -------------------- i have a twin turbo mustang and you don't! Posts: 3686 | From: 650 | Registered: Nov 2002  |  : mustanggt5091 All I need is..... Member # 444 posted                              all I care about is defrost working, so if I disconnect the A/C tree then my defrost will still work? -------------------- 88 GT 357w (SOLD):( 06 Limited Edition R6 !!!!! Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001  |  : 94gt ¯ Member # 3060 posted                                 I do know that the defrost on some cars does use the a/c pump to shoot cool air into the car, just hook it up brotha! -------------------- 2020 Explorer ST 2011 Silver Raptor 'Screw Posts: 5777 | From: Beavercreek, OH | Registered: Jul 2003  |  : JohnB Tech Moderator Member # 969 posted                              The A/C comes on (when in Defrost) due to a design by Ford that cycles the compressor during the winter months to keep it lubricated. -------------------- 1965 Shelby Cobra 1993 Cobra 2012 F150 Raptor 2020 GT500 Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002  |  : 9lbpony ¯ Member # 3510 posted                              also the A/C dehumidifies the incoming air, which does a great job of cutting the "fog" on the inside of the windshield when it's cold out. Posts: 111 | Registered: Oct 2003  |  : mustanggt5091 All I need is..... Member # 444 posted                              here is a shot of what Im talking about, see the line that goes in above the 2 heater core taped of(black tape)inlets, if I remove the vacuuom tree its attached too, the A/C line on the main vacuuom tree, will defrost still work? as you can see, I dont have A/C anyways, and Im trying to clean up the engine bay as much as possible! -------------------- 88 GT 357w (SOLD):( 06 Limited Edition R6 !!!!! Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001  |  : mustanggt5091 All I need is..... Member # 444 posted                              Plus i still gotta figure out how im going to run the heater rails or at least get the main coolant sensor hooked up to a line? -------------------- 88 GT 357w (SOLD):( 06 Limited Edition R6 !!!!! Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001  |  :

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