Nissan Repair: Air Conditioner, drain tube, heater core

Question
When we use the airconditioner in our 2001 sentra water comes out of the vents. I feel the compressor is not draining as I do not see water on the driveway. How do I unclog the drain tube and where is is located?

Answer
John,

The drain tube is on the passenger side and sticks out about an inch.  It is black and has a vent closing to keep dirt out.  You might have a wasp that has made a nest since they seem to like to do that.  A pencil or similar device is all that is needed.  Do not stick it in too far as you do not want to poke a hole in the heater core.  You will know that you have done it when water runs all out.