thanks guys.
Latest update: My control unit just arrived. I installed it and it works perfectly in the center vents only. The compressor kicks in but HOT air blows out the side vents while cold air blows out the center. When I turn on the defrost hot air also blows out teh defrost vents. Gremlins?? ANy ideas? Fuse, relays, if so where will I find them?
thanks again
Pedro