All three of my air knobs are stuck on different things temperature stuck on heat, speed is stuck on 1, and direction is stuck on dashboard.
Check the condition of the heater matrix valve under the dash board. Disconnect any motors or cable connections to it and try operating it by hand. If it is stuck, then replace it.
If not stuck, then check motor operation (if climate control model) or cable routing (if manual only).
SOURCE: AC Problem
Sounds like the blend door is stuck. Unfortunately the blend door is buried deep within the dash.
SOURCE: Heater/AC only works thru defroster vents on '98 Contour
you prob have a vac leak on the back of the intake. good luck
SOURCE: Interior lights on climate clontrol knobs don't work
After showing the dealership this site and the problems that others have had. I insisted that they take a look at it and solve the problem. FINALLY, they admitted that there are lights and that basically it is a pain to fix because they need to order a new module. After one day in the shop, I now have lights for the climate controls in my 2005 Jeep Grand Cherokee Laredo. Do not let them tell you that it only is an option with the Limited. It is just flat out FALSE. I was so frustrated with my dealership because this is shady if you ask me, but they did fix it free of charge. Do your research, call JEEP themselves, and provide the dealership with facts and they should fix it. It's ridiculous how much work I had to do to get them to admit that the Laredo also had the option, but it failed. Don't back down!!!!!!!
SOURCE: how do replace the temperature control knob light
Go to Radio Shack and head to the back where they have the drawers with the LEDs and mini lightbulbs. Get the model no. 272-1140, mini lamp 1 3/4 hookup leads, 6V, 25mA. It costs about $1.49-$2. When you take apart the HVaC unit from the center console, there's two blue twist out plugs on the top near center right and left of the unit. Twist out the one on the side that has the light out. You'll need a small screwdriver to turn it loose. Study how the wires come out at one end of the blue tube and use a needle point plier to carefully untwist the wires and pull it out from the bulb end. Now insert the new bulb w/ the two wires throught the 2 small holes until they come out the other end. Your new bulb is not a perfect fit, so just push it as best you can. Carefully strip the plastic from the wire leads and wrap it in the same position and re-insert the blue tube-thingy back into its place. Turn on your lights and it should light up again. Hope that helps.
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