W124 Climate Control Unit no response

[cleavster]

I pressed the CCU to get the AC working and nothing happens. I pressed all of the buttons and there is no response. I went ahead and checked the 30 AMP fuse and it looked fine. Had a spare and still nothing happens. When I was driving warm air was being blown inside the car without the blower. Bad Blower or the CCU unit? Any ideas? How to properly test..... Thanks!