Alright, my manual climate control unit isn't functioning properly. Air only comes out at level 4, while the compressor turns on for 1, 2, and 3 too but no air is blown out of the vents. Anyone know what the issue is? Thanks.

 

This is a common issue with Nissan manual climate controls. You have to replace the blower motor resistor. It's about $35 at the stealership.

 

My 2k2 was blowing only on position 3 and 4, replaced the fan resistor the other day and it works fine now. Got it for $38 and some change from the local stealership in Hawaii. Not too bad considering we're way out in the middle of the ocean!

 

or you can get a used one from me for 15 shipped.