Hello All, I got a problem with my A/C unit on a second storage. Hope someone could give me some advices before the service man come by.
My A/C unit is making a humming noise when I turn it on--- the unit outside the of the house. See, when I turn on the A/C. Everything inside the house working good. Air is blowing out(air not cold) and the unit in the attic is running.
But the problem is the blower motor fan outside not spinning. It's like there an electrical circuit that making a low humming sound and every minute or so a louder humming followed, and at that instance if I spin the fan blade, it will spin normally. But when it run about 5 minutes OR i changed the temperature on the thermostats, the motor fan blade will STOP running and only humming noise heard.
I used WD-40 to lubricated and electrical parts cleaner to cleaned the inside of the fan motor. It would not helped, still the same problem.
the brand named is Carrier.