I lowered my thermostat and my air conditioning unit is not kicking in... it just blows warm/cool air from the vents inside the house, however outside I've noticed that the fan on the air conditioning unit is not blowing. Can you please advise...

Check/reset the circuit breakers for the outside unit in the main house panel.
Check fuses or circuit breaker in the disconnect near the outside unit.

Easy does it. Electric can be dangerous if mishandled.


NOTE: unless you have a electric meter and know how to use it this is just about as far as you can go as a homeowner. On site service is your next step if the above fails to get your unit going.