I just bought a 2000 Limited and just found out that there in no heat coming form the blowers. The blowers work fine. The mechanic at the place we bought ithas been working on it and found the heater door motor right behind the glovebox was missing so he replaced it and still have no heet. He also swapted out the AC/Heater control panel with another vehicle there to see if the sensor was bad, but it didn't seem to work. What other things can I check to correct this problem. Thanks for any info that you can provide.