You can try the prisoner as you are seeing if you have continuity between your poles, if so, okay, then see whether the reverse works well, this is putting it current and seeing if it acts (closes contacts), from there and to check if it is fine; The thermostat of the equipment, put it hot with a lighter to see if it closes contacts, if it is evil, do not activate the air (because it indicates as if it were coming out cold air), prove to bridge it, just like the prisoner. Go looking at it, because this air conditioning is almost another job other than mechanics, patience here, and desire to learn. Greetings!!