Vent problems
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Junior User
Joined: Mar 2016
Posts: 78
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From: Perrysville ,IN
Vent problems
I got my first truck about a year ago now (86' f250 6.9) and have had to tackle more pressing matters but now I'm on to the vents and having heat this winter. I know very little about this aspect of my truck I replaced the blower motor earlier this year (old one started to smoke) but all I have is defrost no matter what setting I put the vents on, so nothing comes out of the vents nomader what, I believe I have cable type for the vent dams and the truck has the factory A/C any ideas would be appreciated Thank you
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Usually the problem is a vacuum leak or break. Defrost is the default position when there is no vacuum.
So, start at the firewall where a small vacuum line comes off a small plastic manifold and runs toward the corner of the fender and firewall on the passenger's side. There's a tee there where one side goes toward the fron to a vacuum reservoir and the other goes into the cab. Many times the break is where it goes into the cab as there's a grommet and it is easy to break the hard plastic line there.
Anyway, go see this page on my web site: http://www.garysgaragemahal.com/ac--heater.html.
So, start at the firewall where a small vacuum line comes off a small plastic manifold and runs toward the corner of the fender and firewall on the passenger's side. There's a tee there where one side goes toward the fron to a vacuum reservoir and the other goes into the cab. Many times the break is where it goes into the cab as there's a grommet and it is easy to break the hard plastic line there.
Anyway, go see this page on my web site: http://www.garysgaragemahal.com/ac--heater.html.
Lead Driver
Joined: Jul 2009
Posts: 6,477
Likes: 19
From: Sheffield, AL
FarmallM4, here is a link to a thread in the "stickies" which might be worth reading.
https://www.ford-trucks.com/forums/1...-problems.html
https://www.ford-trucks.com/forums/1...-problems.html
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