Cadillac: electronic climate control problem, electronic climate control, motor speed

Question
Heat blows randomly and is uncondrolled by the low,high,auto
buttons. What's the problem? (1985 cadillac eldorodo)

                             Thanks in advance.

Answer
If your saying that you have no control over the blower motor speed, the fault is either the AC/Heater programmer or the BCM (computer). PICTURES of test procedures need to be performed to determine which component is at fault. I can provide the test procedures and pictures but you will have to contact me at: onlineautohelp@msn.com