Cadillac Repair: heater/ac/climate control malfun.., climate control unit, continuous air

Question
Hi,
I own a 1992 Cad Eldorado 4.9 and i have experienced a big problem with my climate control unit. When i start the car the unit will pop on sometimes and other times not work at all. It still has continuous air flow but the digital display for the heater and ac control will readd blank as well as the gas average cluster on the other side. But at times it works great and there seems to be nothing wrong then it'll just stop again.

So please help as i'm not sure what to do or even start to do. Thanks

Answer
Is their any display on the fuel data panel or on the climate control center displaying the letter "c" or "d" or "-151"?.

Your most likely suspect is the BCM (computer) but this has to be verified by PICTURES and test procedures that you can easily do that I will have to supply to you. Contact me at: onlineautohelp@msn.com