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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

problem with blowing through the wrong vents.

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Old Apr 22, 2007 | 01:14 PM
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From: shepherd
problem with blowing through the wrong vents.

on my 85 when i turn the a/c or heater no matter what vent setting i have it on, the panel vents always blow. i don't have much pressure at the defrosters where i need it because it is blowing through the main vents too. is this a door problem. the vacuum diaphram is working up and down.
 
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Old Apr 22, 2007 | 03:08 PM
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Look under the hood on the passenger side, and make sure your vacuum supply hose is connected and in good shape.
 
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Old Apr 22, 2007 | 03:18 PM
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From: shepherd
ok. it looks as though a cable could be connected to the vent selector because there is a mount for one but i can't find one. the diapram that is right behind the radio works when switched.
 
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Old Apr 22, 2007 | 03:24 PM
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From: shepherd
i checked, everything is good. the diaphram under theh hood by the blower motor works as well. is had to be a broken door or something. but is there a missing cable or what.
 
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Old Apr 22, 2007 | 03:24 PM
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There is a cable for the temp control, but this picture does not show a cable connected to the other lever.

http://www.autozone.com/images/cds/g...3d800a81fc.gif
 
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Old Apr 22, 2007 | 03:27 PM
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Here's a picture of the one without A/C. It does use two cables.

http://www.autozone.com/images/cds/g...3d800a81fa.gif
 
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Old Apr 22, 2007 | 10:33 PM
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From: shepherd
i fixed it. i tore the dash apart today and found that the door that closes the defroster and main vents was broken off the hinges. i did some good rigging and used my soldering iron to melt 4 holes. 2 in the ducting and 2 in the door. i then used zip ties as hinges and it works great now.
 
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