Cadillac Repair: 1992 Cadillac Deville--BCM Problem?, cadillac deville, climate control

Question
I have a 1992 Cadillac Deville. While driving and having the air conditioning on the fan went to "Hi" mode and the read out on the climate control went from numbers to "C". A little later heard a click like something reset and everything went back to normal.  A little later same thing happened but heat came along with the "Hi" fan.  We replace BCM, but I still have the same problem. Mechanics can not find problem. Do you have any suggestions?

Answer
Check your connectors to make sure that they are tightly secured to the BCM. If they are, Then you have a faulty BCM, Faulty BCM PROM chip or the prom chip is inserted incorrectly.

Just because the BCM is NEW and or reconditioned it can still be faulty.