I turned my ac on blower in house works no cold air outside unit just hums and fan doesn't come on

Sounds like you may need a new capasitor. Did you check the breaker? The capasitor will be in the electric pannel outside. Look to see if a wire is burnt or if the top of it is domed up.


http://img.alibaba.com/photo/100549606/Dual_Type_Air_Conditioner_Capacitor.jpg

Check your breakers inside the house and out at the A/C. Turn them off and back to on to reset them. A lot of service calls are made only from the home owner not checking the breaker first and resetting them.