Toyota Repair: Air conditioner, k mart, freon

Question
The air conditioner on my 97 celica was changing from cold air to hot air and now has stopped working.  I have no air blowing at all.  What needs to get fixed?

Answer
The most common cause is that the freon has leaked out because of a leak in the system, if the freon pressure is too low the compressor won't turn on, there are a/c recharge kits available at all autoparts stores of large department stores such as K-Mart,just follow the instructions. This may only be a temporary fix since it doesn't take care of the real problem, to do that the system needs to be connected to an A/C machine by a qualified a/c technician, it should be checked for correct pressure and tested for leaks and repaired as necessary.