Check These First:

Is it getting power?

Check your fuses or circuit breakers to make sure they don’t need to be reset. Remember, if your home’s power is out or disconnected, your system may not work.

Is the thermostat set correctly?

Check to make sure that you have your thermostat set correctly. Make sure that it is not being influenced by afternoon sun or a draft from a window. Both of these scenarios can trick your system to stay on too long or not long enough.

Additional Tips:

Clean or change your filters every month
Have your unit cleaned and serviced.
Move furniture away from vents & registers.