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

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Old 04-13-2012, 08:41 AM
Jterr Jterr is offline
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Vacuum and ac control

Any thoughts on what to check when I can't adjust airflow(hot or cold) by turning the control. The air only comes out at window...
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Old 04-13-2012, 04:53 PM
projectSHO89 projectSHO89 is offline
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Go read the FAQs in the HVAC section. Is there an echo in here????

Please do NOT start new threads for the same thing....
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Old 04-13-2012, 07:36 PM
Jterr Jterr is offline
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If I new where the HVAC section was I would surely read it.

I was trying to refrase the first ? as I don't know how to delete it.

Sorry to cause a problem..........
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Old 04-13-2012, 09:58 PM
RebColonel RebColonel is offline
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No problem here. Just go to the top of this page and click on FAQ and then type in what you are looking for.
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Old 04-13-2012, 11:32 PM
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Jterr- the air is directed to the defrost, dash or floor by vacuum cylinders. If things dont change, you probalby do not have good vacuum. Normally you wil end up with defrost only when you loose vacuum. Read the related posts and look for vacuum leaks under the hood on the small vacuum hoses in front of glove box and motor at the firewall.
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Old 04-14-2012, 09:11 AM
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My 97' Expedition I had did the same exact thing. It ended up being a cracked vacuum line near the battery. Them lines get brittle when they get old.
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Old 04-15-2012, 08:30 PM
Jterr Jterr is offline
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Quote:
Originally Posted by steve(ill) View Post
Jterr- the air is directed to the defrost, dash or floor by vacuum cylinders. If things dont change, you probalby do not have good vacuum. Normally you wil end up with defrost only when you loose vacuum. Read the related posts and look for vacuum leaks under the hood on the small vacuum hoses in front of glove box and motor at the firewall.
Quote:
Originally Posted by 00GT View Post
My 97' Expedition I had did the same exact thing. It ended up being a cracked vacuum line near the battery. Them lines get brittle when they get old.
Thanks Guys,
Found the culprit as y'all said. Fixed and all is well.....
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Old 04-15-2012, 08:30 PM
 
 
 
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