Question about 2003 Ford F250 Super Duty Crew Cab

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Climate control is on defrost only the auto

No matter what what you turn the climate control indicator to (heat/air/vent/defrost) it only blows out the defrost vent. the auto locking hubs will not lock.
It is a 2003 Ford F250 6liter diesel

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Check your vacuum pump located on the right side fenderwell. see if its running. Check the vacuum hose at the hubs for leaks or damage. repair if damaged. check for other vacuum leaks such as the grey hose going to the heater control valve.

Posted on Oct 05, 2009

  • gjdoyle491 Sep 14, 2010

    The solution noted above is exactly what the problem is and that is the "Pump" located on the upper most passangers side fo the truck engine area. small, easy to change yourself, and costly 185.00. I have replaced mine now twice and it fixes the problem. This is a bad part by Ford and all one can do is to keep replacing it.

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Posted on Jan 02, 2017

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