BMW Repair: 1999 328i BMW, freon, solenoid

Question
I am having a problem with the a/c blowing cold air. When the a/c is turned on the air coming from the two vents on the drivers side blow cold air, however the vents on the passenger side are blowing warm air. I figured if the freon needed to be charged all the vents would blow warm air. What do you think could be the problem?

Answer
If it is blowing cold air from one side it to should blow cold from the other side.Sounds as if you do not have a blend door opening or closing right.Check the doors(will have to look under dash) A solenoid might be leaking and not allowing the doors to work properly