AC/Vent question

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Mar 22, 2004 | 01:29 PM

purplewg

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Laughing Gas

Joined: Feb 2004

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From: FLA

AC/Vent question

All the vehicles I have ever owned had the vent position that only takes in outside air through the vents. This 04 SD seems to have the air conditioner working when I have control positioned to vent or floor/vent or just floor. It doesn't seem quite as cold as AC by itself but it sure seems the AC is helping the outside air quite a bit. Anyone else noticed this on his or her truck? I guess I need to get up under it and see if the compressor is running in these positions.

Mar 22, 2004 | 01:58 PM

CmprSpecial

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From: Northern Va

On the manual system there are 3 positions where the A/C doesn't operate, panel (one click left from off), off and floor. Otherwise it is on.

Mar 22, 2004 | 02:06 PM

purplewg

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Laughing Gas

Joined: Feb 2004

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From: FLA

Hummmm, I will have to check mine tonight. Mine blows colder than outside air in vent (one click left of off), vent and floor, and floor only. Seems like something is amiss. Thanks

Mar 22, 2004 | 02:18 PM

wlihntr

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Joined: Jan 2004

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From: colorado

mine does just the opposite, when i put it to vent pos. it will blow air warmer than out side air temp

Mar 22, 2004 | 02:30 PM

purplewg

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Laughing Gas

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From: FLA

Yeah, that's what my 7.3 did also....

Mar 22, 2004 | 02:31 PM

Big Orn

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From: NE Texas

The best way to check is to open the hood, crank the engine, and watch the compressor as someone else turns the switch to different locations.

Typically - it's the way CmprSpecial put it.

Mar 22, 2004 | 03:51 PM

bradleygt302

Junior User

Joined: Oct 2003

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From: michigan

from what i see in the ford electrical diagram the a/c compressor is able to run in any position. at least on the 04 gassers

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Mar 22, 2004 | 04:10 PM

bradleygt302

Junior User

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From: michigan

looks like the wiring diagram is drawn incorrectly, the workshop
manual states as CmprSpecial stated above.

Mar 22, 2004 | 04:24 PM

#10

bradleygt302

Junior User

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From: michigan

looks like the wiring diagram is drawn incorrectly, the workshop
manual states as CmprSpecial stated above.

Mar 23, 2004 | 05:41 AM

#11

purplewg

Thread Starter

Laughing Gas

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From: FLA

Well, I didn't get a chance to look at the compressor last night. I had some other chores to do. I will try again tonight to take a look.

Where did you guys get the workshop manuals you mentioned? Thanks

Mar 23, 2004 | 07:52 AM

#12

CmprSpecial

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From: Northern Va

Quote:

Originally posted by purplewg
Where did you guys get the workshop manuals you mentioned? Thanks

I have a relative at Ford, so I can get what ever I want.

Those without connection can go to Ford, or try Helm, the publisher of manuals for Ford .

Mar 29, 2004 | 06:34 AM

#13

purplewg

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Laughing Gas

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From: FLA

Well I finally got a chance to check the compressor out. I got under the truck and had my SO cycle the thing from AC to vent and the compressor turns on with AC and off with vent. Now I know this wasn't happening before as the out air was 84 but the vent air was easily in the 70's. I suspect it is working properly now for some unknown reason.

Aug 23, 2004 | 10:54 PM

#14

Rather be sledding

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Quote:

Originally Posted by wlihntr

mine does just the opposite, when i put it to vent pos. it will blow air warmer than out side air temp

My 2000 Excursion does this as well, anyone know why?

Aug 24, 2004 | 05:34 AM

#15

purplewg

Thread Starter

Laughing Gas

Joined: Feb 2004

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From: FLA

Quote:

Originally Posted by Rather be sledding

My 2000 Excursion does this as well, anyone know why?

This is a guess (see my sig) but I think it is the way the outside air gets into the vent. I think it gets preheated before it makes it into the cab. My 96 did the same thing........