6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

Fan Control...???

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Old

Mar 13, 2012 | 12:22 PM

#1

epfire#233

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Junior User

Joined: Dec 2010

Posts: 81

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From: Twin Cities, MN

Fan Control...???

Here's my issue: When selecting the fan control from Defrost to any other setting there is no change in airflow. Regardless of the selector position the airflow only will come out of the Defrost vents.

Any suggestions on how to fix this would be appreciated.

Aaron

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Old

Mar 13, 2012 | 12:30 PM

#2

texastech_diesel

Token Redneck

Joined: Jun 2007

Posts: 9,339

Likes: 350

From: Breckenridge, TX

Club FTE Silver Member

Vacuum leak somewhere. If it's all the time it could be an unplugged vac line on the heater valve or a dead pump, if it's intermittent or tied to using 4x4 it could be a leaking hub seal, broken hub line, or a bad pulse lock solenoid.

https://www.ford-trucks.com/forums/1...l#post11311531
https://www.ford-trucks.com/forums/1...n-defrost.html
https://www.ford-trucks.com/forums/1...l#post11120913

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Old

Mar 13, 2012 | 01:39 PM

#3

epfire#233

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From: Twin Cities, MN

Thank you for the information Texastech!

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Old

Mar 13, 2012 | 03:00 PM

#4

critterf1

Posting Guru

Joined: Feb 2010

Posts: 2,057

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From: Newport, N.C.

I'd be checking the lines at the vacuum pump motor on passenger fender.

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Old

Mar 13, 2012 | 03:04 PM

#5

m-chan68

Lead Driver

Joined: Mar 2010

Posts: 5,505

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From: Woodbridge, Ontario, CA

Club FTE Silver Member

I'd be checking for power and ground to the vacuum pump if it's not working.

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Old

Mar 13, 2012 | 05:07 PM

#6

epfire#233

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From: Twin Cities, MN

Thank you for pointing me in the right direction!

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