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Two different vacuum actuators opens and close the mode doors to direct the air to the floor, vents, or defrost. Either you have a bad vacuum motor, or (more likely) you have a cracked vacuum hose. Crawl under the dash and listen for a sucking sound. Also, check all the plastic lines to see if they are cracked.
Rick
I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology. Visit my blog for cool articles and TSB's: http://free-auto-repair-advice.blogspot.com
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∙ 16y ago
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Why doesn't my radio work 2004 Lincoln Navigator?
its broke
Why does the front half of the air suspension on your 1999 Lincoln navigator work but the rear is not pumped up?
Either one of your rear air bags have a leak or both have went bad.
Where is are the AC valves on a 2003 Lincoln Navigator?
If you need help with this you should NOT be trying to work on thisvehicle
What would cause turn signals not to work in Lincoln navigator hazards work fuse not blown.?
Turn signal flasher module?
Why doesnt my turn signal not working on a navigator?
I CANT GET MY TURN SIGNAL OR 4WAY FLASHERS TO WORK ,FUELS ARE GOOD. I HAVE A 98 LINCOLN NAVIGATOR CANT GET THE TURN SIGNALS OR 4WAY FLASHERS TO WORK. FULSE OR GOOD
How do you open close Lincoln navigator rear side windows?
There is a switch that allows you to open and close the Lincoln Navigator rear side windows. The switch is located on the overhead console.
Why would both of your front marker lites not work on your 2004 lincoln navigator but yet your signals work on your head lights?
They all have separate circuits, check the fuses.
What kind of sealent should be used to seal a 2003 Lincoln Navigator transmission leak?
Sealant does not work. Replace faulty seal or gasket.
Why does the air blower work only on high on your Jeep Cherokee sport 1999 also the selections swith for feet upper area and defrost only works on defrost and off?
Most likely it is a resistor that has blown on the back of the controls.
My 2001 Lincoln Navigator wont start anti theft light is flashing?
i replaced the fuel pump and now my theft system wont work
Why your Lincoln Navigator rear suspension not work?
The compressor is either bad or your air bags are bad... Get springs from a rear 2wd Expedidion and swap them on your Navigator, is real chep and easy. and it feels just like the air bags. I did it to mine last week...
How does 1970 vw defrost work?
poorly
