Air conditioning blowing warm air

[CND]

I have a 2002 X5 3.0 Sport w/59K. I recently noticed my air conditioning was blowing plenty of air but all warm. By warm I mean the same temperature as outside air.

I took the X5 to an air conditioning shop recommended by my independent. After a brief diagnostic they concluded it is an electrical problem and I am scheduled to bring it back Monday morning for further diagnostic.

Any suggestions as to what the problem may be? Once again plenty of air but none of it cool.

Thanks in advance.