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2001-2005 Explorer Sport Trac All questions related to the 2001-2005 Explorer Sport Trac model.

Air flow stuck on defrost setting.

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Old 04-07-2011, 12:27 AM   #1
GLS
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Air flow stuck on defrost setting.

I have a 2002 Ford Explorer Sport Trac. Regardless of where the control knob is positioned all air, be it heat, air from the outside or air conditioner is coming through as if it was set for defrost. I heard a clunk type noise as I was switching the knob from the floor to defrost position and think something broke inside the heating/air control system - perhaps a lever or door. Has this occured to anyone else and is there a solution for an avid do it myselfer?
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Old 04-07-2011, 05:53 AM   #2
ncranchero
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Clunk is not a good sign..........

I can round up some HVAC info for you if you'd like it. DEFROST is the default setting it goes to if vacuum is lost. Check your vacuum supply lines.

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Old 05-01-2011, 05:02 PM   #3
rblackw474
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I have a 2001 with the same Prob. what can we do?
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Old 05-01-2011, 05:42 PM   #4
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Check your vacuum lines for a break or crack, first thing.




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Old 09-07-2011, 02:26 PM   #5
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vacuum leaks

Do you happen to have a vacuum diagram of the 1996 ford ranger? I have a vacuum line that is disconnected and I can not seem to find where it goes. Its the line coming from under the blower motor towards the air filter. Everything appears to be hooked up to something except this one. May have been white and discolored greenish.

Thanks,
Marty -- aka karaynn
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Old 10-27-2012, 06:25 PM   #6
Creekdweller
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No matter where I turn the knob for air flow control, the air comes out of the defrost. How do I find info on the vacuum lines to see if there is a leak?
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Old 11-04-2012, 08:45 AM   #7
mustang6878
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This older post fixed my problem, hope it helps you...

http://www.explorerforum.com/forums/...d.php?t=192842
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