Mitsubishi Repair: a/c, vacuum hoses, vacuum leak

Question
Have a 2001 eclipse GT During summer whenever i turn on the a/c cool air will blow for 2-5 minutes which is good but after that warm air will replaced the cool air and after 5 minutes cool air will blow again.And during the winter it is the other way around  cool air then warm air and back to warm air. What is the problem ? PLS HELP. TNX

Answer
Mel: I would say you have a vacuum leak. There a lot of vacuum hoses that run things in your heater/air. Either get a repair manual for your car at any parts store or else take you car to a shop. Sometimes it is darn hard to find a vacuum leak. Hope this helps and good luck!