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Old 11-22-2011, 11:21 AM   #1
Edahall
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Join Date: May 2011
Location: Goliad, TX
Posts: 672
A/C continues to run when "Vent" selected

Vehicle: 1990 Suburban

Yesterday as I was driving, I noticed that very cold air was coming out of the vents even with "vent" selected on the controls. I started investigating and the only way I can get the compressor to disengage is to select "heater" on the controls.

How can I fix this problem?
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1990 ¾ ton 4x4 Chevy Suburban
-Cummins Diesel - 12 valve - factory rebuilt
-6 speed bullet proof manual transmission - NV5600
-Gear Vendors Overdrive - HX35 Holset Turbo
-NP205 iron transfer case
-3.73 gears -2" Lift
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Old 11-24-2011, 01:52 PM   #2
6 2 Carl
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Join Date: Mar 2005
Location: Saskatoon, SK
Posts: 31
Re: A/C continues to run when "Vent" selected

Mine does the same thing. I never cared too much as I don't need to use the vent setting, as my vents are always on for some reason. This is a "feature" that I actually like. I like the ability to have the defrost or floor on at the same time as the vents. If I need more air flow to the defrost or floor I just close the louvres on the vents.
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1987 R10 Chev Suburban 6.2L Diesel

1984 Frame 1990 Body V20 Chev Suburban 6.2L Diesel Banks Turbo
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