Question about 2001 Ford F250 Super Duty Super Cab

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2001 f250 diesel

No heat or air to floor or cab vents only to defrost were do i start dont to take the dash apart if i dont have to help

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  • blea432 Jul 29, 2008

    Cant seem to find the vacuum leak, no heat/air flow in the cab vents only out defrost. Changed vacuum pump, no difference.

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Either your A/C vacuum hose has a hole in it or your valve inside the A/C blower is not opening and closing properly

Posted on Jun 04, 2009

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Had the same problem on my 2001 Super Duty.
Solution: leaking vaccume line to the auto locking hubs. It seems Ford saw fit to tie the two systems together. Once I fixed the lines to the hubs my vents worked properly.

Posted on Jun 14, 2008

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1 Answer

I have a 1975 k5 blazer and it blows cold air it worked fine last year but now it only blows cold air even on the defrost setting what can the problem be and how can I fix it?


A vent flap actuator probably needs to be replaced. It's what moves your vent flaps from heat to A/C or to plain "vent air" when you change settings.

The discussion in the link includes vent flap actuators. Unfortunately, they also include the infamous no low speed fan problem too.

Cannot get any air from dash vents while defrost and floor vents work fine...

Your particular actuator will be a different one than they found.
They're all a absolute pain to get at because they can be well buried in the dash. I would start looking under the dash on the passenger side, that's where most of the air control is. Cannot get any air from dash vents while defrost and floor vents work fine...

Nov 14, 2016 | Cars & Trucks

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its called the blend door actuator
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There is a blend door acuator which moves when u change your settings. Its a electric motor. Down under dash, Will need a mech and a heating and cooling diagram to find where the motor is,

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When i turn my heater on to blow out to defrost or floor it does not blow hot air. but you can feel the hot air behind the dash


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All Air Conditioning blows our the defrost vents


Some thing you could look at would be this. The control is usually fed by a vacuum line or small hose thats is connected to your intake manifold.
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Thats usually the trouble.
I hope this helps you.

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