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07-02-2014, 07:43 PM
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#1 | |
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AF Regular
Join Date: Aug 2005
Location: Sidney, Ohio
Posts: 288
Thanks: 4
Thanked 6 Times in 6 Posts
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AC Staying On
I have a 1999 Silverado. I have noticed the AC stays on even if the light is off. Is this normal?
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07-02-2014, 08:24 PM
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#2 | |
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AF Fanatic
Join Date: Jul 2011
Location: Worcester, Massachusetts
Posts: 5,017
Thanks: 70
Thanked 618 Times in 610 Posts
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Re: AC Staying On
Are you talking about the compressor, or the blower motor?
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07-02-2014, 09:52 PM
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#3 | |
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AF Enthusiast
Join Date: Jul 2005
Location: troy, Ohio
Posts: 2,311
Thanks: 2
Thanked 171 Times in 169 Posts
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Re: AC Staying On
This is true if you are in defrost or blend mode...by design.
__________________
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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07-06-2014, 08:28 AM
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#4 | |
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AF Regular
Thread starter
Join Date: Aug 2005
Location: Sidney, Ohio
Posts: 288
Thanks: 4
Thanked 6 Times in 6 Posts
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I know it stays on anytime it's on defrost or floor/defrost. Is it also supposed to stay on when it's on floor/vent or just vent?
Mine blows cool air no matter what the AC switch is set to. I can also hear the compressor cycle on/off just like I had the AC set to on. |
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07-06-2014, 01:58 PM
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#5 | |
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AF Enthusiast
Join Date: Oct 2011
Location: Ft Lauderdale, Florida
Posts: 953
Thanks: 13
Thanked 121 Times in 120 Posts
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Re: AC Staying On
"Is it also supposed to stay on when it's on floor/vent or just vent"?
Fan yes compressor no. |
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07-06-2014, 05:13 PM
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#6 | |
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AF Regular
Thread starter
Join Date: Aug 2005
Location: Sidney, Ohio
Posts: 288
Thanks: 4
Thanked 6 Times in 6 Posts
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I figured it out. I did not notice that it was set to recirc not fresh air. Once I set it to fresh air the AC stopped running. Apparently the compressor runs when set to recirc.
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