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#1
04-28-2008, 06:39 PM
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AC blows wrong
1994 S15 GMC Jimmy-air conditioner blows cold air but it all comes out the defrost or the heater ports, no matter where you put the switch.
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#2
04-28-2008, 08:26 PM
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Re: AC blows wrong
Look underhood at the vacuum ball reservoir that is mounted to the hood- See if the rubber vacuum hose has come unplugged from the ball- this is usually what is wrong when as you have described your situation.....
__________________
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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#3
04-28-2008, 10:10 PM
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Re: AC blows wrong
only vacum ball is next to engine coolant reservoir, one hose on it. nothing is mounted on the hood but the light.
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#4
04-28-2008, 10:25 PM
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Re: AC blows wrong
Check vacuum lines from engine to heater controls.
Also make sure it uses one or two hoses on vacuum ball. MT
__________________
Remember proper testing gives us the answer to many problems. MT
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