Hi I'm new to this but I'm having same issues wit my heater blows kinda warm out defrost but when I change to me thing else starts blowing cold both heater core line are hot it was jus work in fine the other day and battery was kinda loose and didn't start so I tighten it and then noticed the next day mine is the computer climate control iv tried to recalibrate it but still the same please help it's getting cold out now