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#1
08-13-2012, 09:13 AM
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1999 Malibu AC Problem/Question
Hi -
My daughter's 1999 Malibu has experienced that 'dirty' AC control head problem that has been well documented over the years. After removing, cleaning and replacing the AC now comes on reliably and the AC light is no longer blinking, etc. My question: The recirc/outside air buttons work as expected when pressed. The lights come on (toggles between the two) and the vent actuator works as expected. However, when the engine is shutdown and restarted, the the AC control head always comes up with the OUTSIDE Air Light ON, regardless if the the engine was powered off with the RECIR light on. I'm trying to understand why this is happening. The wiring diagram that I have of the AC control head does not show anything in regards to the Outside Air/Recirc buttons/lights. Does anyone have knowledge as to why this is happening and what needs to be done to repair? (Short of replacing the Control Head). If anyone has a better schematic/wiring diagram I would appreciate it also. Any help would be appreciated.. thanks Jim 
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#2
08-13-2012, 10:44 PM
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Re: 1999 Malibu AC Problem/Question
Sounds perfectly normal to me- the system defaults to outside air upon ignition off- check another malibu to confirm....
__________________
Automotive A/C Engineer with: '99 IH 4700 Toy Hauler (2) '95 GEO Prizms both maroon '99 GMC Yukon '95 Chev 3500, 454 Dually Crew Cab- 145k miles- Wife's Camel trailer puller. '94 Astro- 370k miles '94 Firebird Formula- 5.7L 180k miles- gone- '92 Chevy Lumina Van 3.8L 264k '86 GMC S-15 - 2.8L 154k '87 Buick Park Ave . 187k '86 Buick Park Ave 3.8L 199k miles- gone '77 Chevy Vega- 2.5L 175k miles gone but not forgotten '68 Camaro 396 4 spd RS/SS -72k miles-
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