Volvo: air conditioner and back door lock, inner fender, compressor unit

Question
Hi,  I have 2 questions for you.  My air conditioner is not blowing any cold air and my son was going to give it a boost with the solution that is needed. He can not find the location for the air compressor unit.  Can you tell me where it is in the engine.  Also my back door stays locked until I hand lift the lock, the automatic lock does not work for just for that one door.  How can I fix it.  Thank you in advance for your help.

Answer
Jeanmarie,
Depending on the year and model of you car the locations varies for the charging port.
Look on the right side along the inner fender for a black pipe that has a black cap on it toward the front of the car. That should be the low side port for the A/C.
As for the door lock the locking motor is most likely defective and will require a replacement.