Question about 2006 Ford F-250 Super Duty

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'06 diesel super duty air through defrost vents only

If the damper is vaccuum controlled where is the most likely spot to check for the busted hose? is there a control that could also be the culprit?

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I had the same problem and it was dure to a vacum leak. If you want to check it, look on the right (passenger) side against the fender and you will see a little plastic vacum regulator with two hoses going to it.

Posted on Aug 14, 2008

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1 Answer

F250 no air from dash vents, works on floor and defrost


Possibly some blockage? Foam where it shouldnt be?

Nov 07, 2013 | Cars & Trucks

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The air flow vent is stuck on defrost mode. when i switch to a/c or face/floor no air is directed out. the fan seems to be working fine


The air direction is vacum controlled. If you have 4X4 and ESOF ( switch in the cab) then you need to inspect the vacum lines that go to the hubs and possibly the hub seals. "default" position for air flow is the defrost position. If you DON'T have 4X4, and it's a diesel engine, inspect the vacum pump, If it's a gas engine then look at all the vacum lines from the intake manifold for a leak.

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7.3 liter diesel want stay on ran out of diesel


air in lines take a air compressor set it to about 10psi put hose in tank and wrap a rag around to help seal it and get someone to crank it until it starts be careful and dot inject too much air in the tank or u will bust it

Feb 06, 2011 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

My 06 6L diesel has no power, and gets about 15mpg empty. It only has 17000 miles. No codes come up on the computer. Boost at 22lbs. Whats up?


REPLACE AIR FILTER.STOPPED UP AIR FILTER FILL EFFECT TURBO CHARGE PERFORMANCE.22 PSI IS OVER BOOSTING.CHECK VACUUM HOSE GOING TO WASTEGATE SOLENOID.MAKE VACUUM IS GETTING TO SOLENOID.IF GETTING VACUUM HAVE WASTE GATE CONTROL ROD ADJUSTED.THATS WHY YOU GETTING OVER BOOST.

Sep 21, 2010 | 2006 Ford F 350 Super Duty

1 Answer

I have a 2001 F250 Superduty 7.3l Diesel. When I


I had a problem with vacuum in my F250 diesel. It had a new vacuum pump but would kick out of cruise control every time the vacuum pressure dropped. It turned out to be the vacuum reserve cannister had holes in it.

Seems you reach a tipping point and then all the vacuum systems mess up. You might want to check the reserve cannister and any vacuum servo your 4x4 might have. You can check most of the vacuum stuff with the engine OFF using a vacuum pump. You could have a leaking vacuum pot operating the ductwork. Check your diesel vacuum pump for output and loose belts.

Jan 07, 2010 | 2000 Ford F250 Super Duty Crew Cabs

1 Answer

Climate control is on defrost only the auto


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.

Oct 03, 2009 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

A/c changes to defrost when i put truck in 4 wheel drive


Hello I am Ron ,,check for a vacuum leak or vacuum hose that has collasped under hood,and under dash.Hope this sheds some light on the problem

Jul 19, 2009 | 2002 Ford F250 Super Duty SuperCab

1 Answer

Heater and air vents in dash hung in defrost mode


Check the vacuum supply from the intake manifold.

Jun 08, 2009 | 2002 Ford F250 Super Duty SuperCab

2 Answers

I have 99 ford F250.The heater is stuck in the defrost mode,have checked vaccum lines all hooked up, check fuse to vacuum pump its ok, any other ideas


do you have a source of vacuum? normal problem occurs on the vaccum line from the engine to the vacuum switch of the car. unplug the vacuum hoses from the rear of the switch and feel if there is hose that is sucking your finger. if there is none, then trace the line towards the engine firewall out to the engine compartment. it could be broken that is why it is stuck in defrost mode.

i hope i was able to help.
pls rate me..
tnx..drcool

Jul 21, 2008 | 2006 Ford Super Duty F 450 Drw

2 Answers

2001 f250 diesel


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.

Jun 05, 2008 | 2001 Ford F250 Super Duty Super Cab

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