Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 1997 - 2003 F150
Sign in using an external account
Register Forgot Password?


1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 05-31-2012, 01:07 PM
Rcurry2069 Rcurry2069 is offline
New User
 
Join Date: May 2012
Location: Mason, TN
Posts: 5
Rcurry2069 is starting off with a positive reputation.
2003 F150 FX4 need ac help in a bad kind of way!

Ok guys, I'm new to the forum, and have read a few things and really like what y'all have going here. I have a 2003 Model F150 4x4 that has always ran good for me, and has only had minor issues ever since I've had it. Not too bad considering it has 266,xxx miles on it and running 100 miles a day on the original motor & transmission.

Here's my problem - my air conditioning will only blow thru the defrost. I can hit vent on the control panel and it will blow thru the vents, but if i hit max ac it switches to defrost. I live close to Memphis, and it has gotten super hot around here and i really need this to work correctly. I'm hoping a little advice from y'all could help, bc a shop will cost me an arm and a leg. I'm not very knowledgeable about this stuff (have worked more on older vehicles) so i guess i'll need a fairly detailed reply if possible. I have looked under the hood looking for messed up vacuum lines but haven't seen any that looked bad.

Please help if you can and thank you for reading!
Reply With Quote
  #2  
Old 05-31-2012, 01:54 PM
Papa Tiger's Avatar
Papa Tiger Papa Tiger is offline
Posting Guru
 
Join Date: Mar 2012
Posts: 1,036
Papa Tiger has a good reputation on FTE.Papa Tiger has a good reputation on FTE.
Have your AC tested for PSI. It may need a additional charge of refrig espacially if you have never had it serviced. My 2003 needed about a half can a couple years ago. Check your codes for EATC failure related vacuum door problems. O-ring failure can bring about failure of the doors. check the Vacuum system for leaks. Low vacuum will affect operation of the doors. If you find a vacuum leak, fix it. You can get a can of refrig with a gauge on it. Fill your low pressure side to specs making sure about the temperature of outside air/PSI ratio. You can purchase a rebuilt air temp cantrol unit but replacing it, you may need some help. Internally the o-rings may be damaged leaking across. Getting the Refrig back up to PSI may help you for sometime and finding a Vacuum leak will save you lots of $$$$'s
__________________
F150's my best friend.
Reply With Quote
  #3  
Old 05-31-2012, 02:46 PM
Rcurry2069 Rcurry2069 is offline
New User
 
Join Date: May 2012
Location: Mason, TN
Posts: 5
Rcurry2069 is starting off with a positive reputation.
Well it still blows very good on vent thru the vents, and also blows very good thru the defrost (even when the max ac is selected)
Reply With Quote
  #4  
Old 05-31-2012, 02:48 PM
Rcurry2069 Rcurry2069 is offline
New User
 
Join Date: May 2012
Location: Mason, TN
Posts: 5
Rcurry2069 is starting off with a positive reputation.
And it does need a little freon i would imagine bc at a stoplight, it won't blow quite as cold. This shouldn't effect the vent system though should it?
Reply With Quote
  #5  
Old 05-31-2012, 05:53 PM
steve(ill)'s Avatar
steve(ill) steve(ill) is offline
Post Fiend
 
Join Date: Jul 2005
Posts: 6,262
steve(ill) has a good reputation on FTE.steve(ill) has a good reputation on FTE.steve(ill) has a good reputation on FTE.
location of the air has nothing to do with freon. There are 3-4 little vacuum cylinders that stroke doors inside the duct and route the air to the defrost, vents, floor, or combo. If you loose vacuum to the system, then the default is to go to defrost. You need to check the heater also. Can you put air to the floor, and vents, or always defrost. If if just screws up on "max ac" , then you probalby have a leak on that hose or cylinder for the "cab recirc door". The loss of vacuum causes the other doors to go to defrost.
__________________
2002 SuperCrew 4 x 4 5.4 XLT -115K miles -NEW
2010 EDGE FWD - V6 ----------40,000 miles
2002 Explorer 4 x 4 4.0 XLT --- 162,000 miles
2001 SuperCrew 4 x 4 5.4 XLT -235K miles -GONE
Reply With Quote
  #6  
Old 05-31-2012, 05:54 PM
projectSHO89 projectSHO89 is offline
Post Fiend
 
Join Date: Jan 2004
Location: St Louis
Posts: 9,285
projectSHO89 has much to be proud ofprojectSHO89 has much to be proud ofprojectSHO89 has much to be proud ofprojectSHO89 has much to be proud ofprojectSHO89 has much to be proud ofprojectSHO89 has much to be proud ofprojectSHO89 has much to be proud ofprojectSHO89 has much to be proud ofprojectSHO89 has much to be proud of
You can get a head start by going to the section of the forum dedicated to HVAC systems and reading the FAQs there.
__________________
2001 F250 SD V10 4x4
HVAC FAQs: http://www.ford-trucks.com/forums/75...xpedition.html
Owner's manuals: www.motorcraftservice.com
It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.” - Mark Twain
Reply With Quote
  #7  
Old 05-31-2012, 05:55 PM
steve(ill)'s Avatar
steve(ill) steve(ill) is offline
Post Fiend
 
Join Date: Jul 2005
Posts: 6,262
steve(ill) has a good reputation on FTE.steve(ill) has a good reputation on FTE.steve(ill) has a good reputation on FTE.
look at the bottom of this page at the diagram.
http://www.ford-trucks.com/forums/91...-please-2.html

http://www.ford-trucks.com/forums/91...-please-2.html
__________________
2002 SuperCrew 4 x 4 5.4 XLT -115K miles -NEW
2010 EDGE FWD - V6 ----------40,000 miles
2002 Explorer 4 x 4 4.0 XLT --- 162,000 miles
2001 SuperCrew 4 x 4 5.4 XLT -235K miles -GONE
Reply With Quote
  #8  
Old 06-01-2012, 08:17 AM
Rcurry2069 Rcurry2069 is offline
New User
 
Join Date: May 2012
Location: Mason, TN
Posts: 5
Rcurry2069 is starting off with a positive reputation.
If i hit floor, it goes to defrost as well, but if i hit vent it blows thru the vents like its supposed to
Reply With Quote
Old 06-01-2012, 08:17 AM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
2003 expedition a/c blowing thru deforst not thru vents 150Rob Expedition & Navigator 3 09-30-2014 04:37 PM
2003 F150 FX4 need ac help in a bad kind of way! Rcurry2069 Cooling, Heating, Ventilation & A/C 1 05-31-2012 07:52 PM
2003 f250 6.0 diesel a/c problem claycomotrucks1991 Cooling, Heating, Ventilation & A/C 22 05-29-2009 12:02 PM
2003 ac unit removal for defrost venting ladon4893 Cooling, Heating, Ventilation & A/C 1 06-06-2007 01:37 PM
A/C blows thru defrost vents? tigerdude2001 1987 - 1996 F150 & Larger F-Series Trucks 7 12-16-2001 03:10 PM


Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 1997 - 2003 F150

Tags
03, 2003, ac, charge, defrost, door, f150, ford, freon, fx4, max, psi, refrigerant, system, vacuum

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump



All times are GMT -5. The time now is 01:22 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup