Volvo Repair: 2000 s70, pressure sensor, freon

Question
My A/C is  blowing hot air.  I have had freon added and it only cooled for a few days but would also blow warm air if the car was idle. I have also noticed that the cooling fan does not come on after the car is turned off. The fan does work while the car is on.  Could this be the problem?

Answer
Norma, there may be a huge leak somewhere. There is a possibility that the pressure sensor went bad.  The fan issue is not the problem.  Most likely its an Evaporator leak.  Common item on the S70.  I would have the car checked thoroughly by a Volvo Shop.  Roger