Change to 4x4, AC switches to defrost vent, why? - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-12-2007, 02:43 PM
Premium Member
 

Join Date: May 2007
Location: Freeport, Kansas
Posts: 120
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Change to 4x4, AC switches to defrost vent, why?

On my 2000 F350, my son noticed when he changes to 4x4, the AC quits blowing out of the front vents, and switches to coming out the defrost. Is this supposed to happen, or is a vacuum problem in a valve somewhere?
thanks,
Jim
By the way, love my truck!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 07-12-2007, 02:46 PM
Almostdunfukinwidit


 

Join Date: Nov 2006
Location: Trempealeau, WI
Posts: 30,948
Thanks: 106
Thanked 88 Times in 82 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to Dave
Probably leaky seals in the auto hubs
Reply With Quote Quick reply to this message
  #3  
Old 07-12-2007, 07:16 PM
Premium Member
 

Join Date: May 2007
Location: Freeport, Kansas
Posts: 120
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Are they easily replaced?
Reply With Quote Quick reply to this message
  #4  
Old 07-12-2007, 07:39 PM
Member
 

Join Date: Nov 2006
Location: Western Wisconsin by MN border (Twin Cities)
Posts: 40
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
My standard caveat of "I'm not an expert" but...There's a couple of possibilities, there's a yellow O-ring on the hub that's part of the vac-u-suck hub system, and there's an O-ring on the hub itself too. seems like the Yellow one is the likely culprit. I think you can find some guides on it, like Welcome to guzzle's 4x4 Needle Bearing Maintenance Web Page Even though that's aimed at the needle bearings, it'll still show taking off the hub and where the O-rings are I believe.

I just replaced my hubs with Warn Hubs and blocked off the vacuum lines myself...
Reply With Quote Quick reply to this message
  #5  
Old 07-16-2007, 07:22 PM
Powerstroke.org Fanatic
 

Join Date: Aug 2006
Posts: 102
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
A little off topic, but will Guzzle's 4x4 Needle Bearing Servicing description work on dually front axle?
Reply With Quote Quick reply to this message
  #6  
Old 07-21-2007, 05:01 PM
Member
 

Join Date: Jun 2007
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
leaky auto hub seals...they are not that easy to replace...they can be installed without the special tool, but it can be quite a PITA..

If it were my truck, I would plug off the hoses and use the hubs manually if yours have that option, or install manual hubs...the auto hubs cause a lot of grief.......i know the work great when they work, but when they fail, they suck in contaminants, water etc into your hub area...I prefer manual...and a lever in the cab too..
Reply With Quote Quick reply to this message
  #7  
Old 07-29-2007, 03:15 PM
Powerstroke.org Rookie
 

Join Date: Oct 2006
Location: Shirley, IN
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
It could be something as simple as a cracked vacume hose that goes to the hub, or a rusted nipple that the hose connects to. I'd start by checking the simple outside stuff first!

Doug
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 09:23 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors