This sounds like the common blend door problem on this model. The plastic door is driven by a DC motor that is geared too strong for the application. Over time the motor will overstress the door and break the connector. The same plenum box is used on the F150 and you can find information on the problem by searching for that model also. There is a video available on YouTube showing how to diagnose and repair the system. It is an expensive repair at the dealer, but you can repair it yourself with minimal skills. You can follow links on my bio page for pictures and additional information on how to diagnose and repair the problem.
how to disarm the factory alarm on a 2000 lincoln navigator
my 2000 Lincoln navigator weighs 6700 lbs.
According to the 2000 Lincoln Navigator Owner Guide ( 5W-30 )
how you find a air suspension relay in a Lincoln navigator
According to the 2000 Lincoln Navigator Owner Guide ( 5W-30 ) * with engine oil filter change , 5.7 litres / 6.0 U.S. quarts of 5W-30 engine oil
On a 2000 Lincoln Navigator : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
You can view the 2000 Lincoln Navigator Owner Guide online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides
On a 2000 Lincoln Navigator : The switch for turning OFF the air suspension compressor is located in the front passenger footwell , by the kick panel
A 2000 Lincoln Navigator needs 6 quarts of oil, and the recommended viscosity is 5W20. ========================================================= The 2000 Lincoln Navigator Owner Guide shows to use ( 5W-30 ) The 6.0 U.S. quarts with engine oil filter change is correct
Show me where that air valve control valve is located on a 2000 navigator
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On a 2000 Lincoln Navigator : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle