I have a 2003 lincoln navigator and my climate control in my truck stop working, is it a fuse i can use to get it started because its nothing wrong with my heat/air but i changed a fuse that had something to deal with the climate control but when i push the button of the climate control it's still coming on please can someone please help me!!!!!!

SOURCE: My heated/air cooled seats do not work

You may try cleaning the filters and checking for loose connections. Heat and cooling filters should be changed or cleaned with some regularity. Like an air conditioner, these things require maintenance that are often overlooked.

SOURCE: climate controls

Car manufacturers use the defrost mode as a default for safety reasons. Being they want you to be able to defrost the windshield no matter what. So when something goes wrong the system automatically goes to the defrost mode. You most likely don't have the vacuum hose connected under the dash at the climate control assy. Or if this vehicle doesn't use the vacuum hose style you may have not plugged in one of the connectors under the dash or behind the climate control assy. Good luck.

SOURCE: 2003 lincoln navigator reverse sensor no longer

This is a very common problem and depending on the code, its very likely a radar sensor. It is located in the bumper cover.

SOURCE: 2003 Lincoln Navigator Heated Seat Problem

Can only Diagnose with a scanner and a trouble chart. It's all electronic

SOURCE: The rear a/c is making a clicking sound/2003 Lincoln Navigator

you have a bad blend door actuator the clicking sound you hear is the plastic gears inside it slipping the panels covering rear unit can be removed once removed cut a/c on once clicking starts you should be able to tell which one it is they are about the size of a cell phone usually twoo or three screws holding on to air box and one small electrical connector remove and call ford dealership with part# listed on the actuator and purchase new one these are not available aftermarket that i know of