Don't get upset but I'll tell you like I did someone yesterday that I could care less what you have replaced, it bears no part in a usefull diagnostic unless we look for things you coud have done wrong in those areas.

The absolute worse thing one can do is assume anything works just cause it was replaced.

I'm not sure I understand your symptoms as at the beginning of your post you describe being stuck in defrost mode (which is max heat and max blower - always) and then comes this sentence:

"The recirc light/switch blinks/clicks a few times and if I dont 'feather it' back towards cool I lose cool altogether. I did this with the replaced blower reg and the old one."

It sure sounds like a PBC problem. What year car is this? The only time I have seen recirc lights blink there were fault codes. Only the latest 126 cars had AC fault codes. (I think).

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician