I have been doing Hvac for probably 15 years off and on.. Been helping my buddy that does HVAC everyday for the last 20 years..Got a call 2 days ago that the airconditioner was freezing up..nothing was blowing out her ducts... I figured it was dirty filter..not so..It was no blower fan running making it freeze up.. so we dicided it was the fan central control..running off the limit switch..had one in the van..change out just like old one that had been working...one wire at a time..same install..5hrs. Later...it's either fan running all the time..or not at all.... Iv'e wired it six way to sunday..even drove to dayton and got a scamatic..didn't work..been through all the Therm. wires..everything is the same..or should be..it was working before...I'm about to pull whats left of my hair out.. .. So who's the Electricion..thats going to point out the simple S#1T..that i'm missing.......B,...