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climate control problems maybe?

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Old Jun 20, 2010 | 07:54 PM
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climate control problems maybe?

Hey everyone I will see if I can get this explained or not and not sure if it is normal or not so please help me out. Thanks a million.

Alright so when we want say the A/C on and switch it over to Panel or where the air comes out the front vents it doesn't. It does but say when I am accelerating or going a steady speed it switches over to the defrost outlets but then once we are slowing down the it switches and comes out the fronts vents properly again, seems like it is speed sensitive. Is this a normal thing on a climate controlled vehicle doesn't seem like it.

It is on a 2003 Lincoln Navigator. Hope someone can shed some light thanks everyone take care.
 
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Old Jun 20, 2010 | 08:58 PM
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That is not normal. You need to look for a one way valve in the vacuum lines. It seems that you have a bad one in the system.
 
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Old Jun 20, 2010 | 08:59 PM
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I was maybe thinking a vacuum leak somewhere does anyone know where the vacuum lines are located on a 03 navi
 
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Old Jun 20, 2010 | 09:08 PM
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Definitely a vacuum leak.

Same thing was happening on my wife's 04 Eddie Bauer and it was due to a disconnected vacuum line at the top of the engine. I had knocked it loose while changing the alternator.
 
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Old Jun 20, 2010 | 09:22 PM
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There is an HVAC vacuum line that runs under the battery tray. There are several threads on here about the battery corrosion leaking down and eating away at this vacuum hose and causing the symptoms you've described.

Here, read this (page 2) of this thread:
https://www.ford-trucks.com/forums/8...t-vents-2.html
 
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Old Jun 20, 2010 | 10:48 PM
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thanks a million guys will hopefully get a chance to look at it tomorrow evening wifes gone to work tomorrow with the navi but will post back with my findings hopefully and easy vac line fix
 
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Old Jun 20, 2010 | 11:19 PM
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well went out and took a quick peak and yup exactly the same place of the picture in that link will get that fixed up asap thanks everyone will let ya know how it goes
 
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Old Jun 21, 2010 | 01:35 AM
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Aren't you glad you asked?
 
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Old Jun 21, 2010 | 08:10 AM
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Originally Posted by alloro
Aren't you glad you asked?
Sure am hope it fixes wife stole the navi for the day now but hopefully I can get some tubing picked up to fix it up when she gets home. Thanks a million everyone.
 
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