Toyota: Air conditioning problem, car repair shop, computer mechanics


Question
I have a 2000 S70 Turbo Volvo.  I believe it is a 2.4 liter engine.  Great car.  I had a leak in the a/c, got it repaired.  The problem is that when I start the car and turn on the a/c, the a/c is great.  Driving for awhile, the a/c seems to stop blowing cold air, but it does still blow.  If I turn the a/c to off, and wiat awhile, sometimes it gets back to a cold air.  Sometimes not.  I tried opening the window for awhile, then closing the window.  I turned the a/c back on and it worked fine.  I took the car in to a foreign car repair shop.  It was a friend of a friend.  He had a tester and was going to charge me about 75 dollars to go in with the tester and re-set the computer.  He said that the computer was not acting properly.  His tester he said only went to 1999, so he tried to fix it, but did not fix it.  He did not charge me, and said that if it was fixed, to come back and pay him.  I would have done that, but the a.c still does not work.  Does this sound feasible and is the only place I can go is the Volvo Dealership?  I live in Jacksonville, Florida.  Thank you for your time and energy.

Answer
A Volvo question for a Toyota guy?  LOL!  Anyways, um...  well, I don't know if Volvo has anything where the A/C is ECU dependent.  My first move would be to check the amount of refrigerant in the system.  If there isnt' any or very little, problem solved.

I do hate "computer" mechanics because new technicians want to just depend on the car's sensors and not with their own eyes, hands, and ears.  

The second thing is to check the compressor and see if it's in working order.  You CAN check the ECU to see if it has any error codes for the A/C system in it's memory to see if it found a problem with the car before you purchased it.

And.. no..  A good import car mechanic should be able to help but if all else fails, then the Volvo stealership would be the place to go.  An A/C guy would be my first stop though.  Getting their thoughts on what they think my problem is.