a/c system stink solved
my 95 mecurey gm had the same problem
no amount of a/c system spray cleaner / deodorizer is going to help you
- that stuff even gives me headaches
the solution was simple as it turned out and I've now had 5 summers without the a/c stinking like cow poo
some time ago I bought one of "street scene's" smooth cowel top
a simple kinda cheep hunk of fiberglass that replaces the factory black plastic cowel vents with a smooth ventless cover
I installed it in the fall and to my suprise every summer since then my a/c stink is gone
simple solution , keep the rain outta the cowel
as for the smell of cow poo - it's gone , compleately and totally and has been gone now for the fifth summer in a row



