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09-03-2012, 07:28 PM
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#1 |
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Registered User
 
Join Date: Jul 2011
Location: Shreveport La
Posts: 73
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Normal verses Max AC?
OK, whats the difference? It's got me scratching my head. I cant tell the difference
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85 Silverado SWB |
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09-03-2012, 07:36 PM
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#2 |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Re: Normal verses Max AC?
I believe MAX recirculates the air, normal just vents in outside air
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2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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09-03-2012, 08:15 PM
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#3 |
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Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: Normal verses Max AC?
Correct, Max AC closes the outside air door and recirculates the air in the cabin,,,cools it down quicker and keeps it colder since the air circulating through the Evap is already cold.
Regular or Normal mode opens that air door and pulls outside air into the system. If you aren't feeling a difference then you might want to check the outside door operation and make sure it's moving. Usually a vacuum diaphram that operates it. Bad diaphram or leaky vacuum line??? When they aren't operating the door generally stays in the outside air mode. |
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09-03-2012, 08:26 PM
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#4 |
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Registered User
Join Date: Jul 2011
Location: Shreveport La
Posts: 73
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Re: Normal verses Max AC?
That is behind the Passanger Side Kick Panel right?
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85 Silverado SWB |
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09-03-2012, 08:28 PM
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#5 | |
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Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: Normal verses Max AC?
Quote:
If you have a hand held vacuum pump it's easy to simply plug that in,,,turn the air on and work the pump. Door should open and close and you'll feel/hear a difference in air flow. |
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09-03-2012, 08:31 PM
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#6 |
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Registered User
Join Date: Jul 2011
Location: Shreveport La
Posts: 73
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Re: Normal verses Max AC?
Going to stand on my head in the floor board right quick.......
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85 Silverado SWB |
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09-03-2012, 08:32 PM
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#7 |
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Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: Normal verses Max AC?
 I know the feeling.
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09-03-2012, 08:52 PM
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#8 |
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Registered User
Join Date: Jul 2011
Location: Shreveport La
Posts: 73
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Re: Normal verses Max AC?
Bingo. No activity on the Flapper. /adds that to my "to do list" for next weekend.
Thanks for the info and pointing me in the right direction.
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85 Silverado SWB Last edited by TJBrown; 09-03-2012 at 11:08 PM. |
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09-03-2012, 10:33 PM
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#9 |
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Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: Normal verses Max AC?
You bet,,,,glad it was that easy
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