This can be Caused by your Thermostat:

Solution:

• Make sure your thermostat is turned on
• Set 3 degrees below room temperature
• Turn on cool, not fan or heat

If the thermostat screen is blank, then the battery is dead. Replace the battery.

Your Air Filter May be Dirty.

Check yours and change if visibly dirty

Your AC's circuit breaker may have been tripped:

Here's what to do:

• Find your breaker box and look for the circuit labeled "air conditioner"
• Try flipping that circuit to "off" and then "on"
• Give your air conditioner a couple minutes and see if it comes on now

This can be Caused by your Thermostat:

Solution:

• Make sure your thermostat is turned on
• Set 3 degrees below room temperature
• Turn on cool, not fan or heat

If the thermostat screen is blank, then the battery is dead. Replace the battery.

This can be caused by your Thermostat:

Solution:

• Make sure your thermostat is turned on
• Set 3 degrees below room temperature
• Turn on cool, not fan or heat

If the thermostat screen is blank, then the battery is dead. Replace the battery.

Make sure power is getting to the furnace

Try this:

• Check your home's electrical panel. Flip the furnace's circuit to "off" and then "on" again.
• Look for a switch (like a light switch) near your furnace and make sure it is set to "on".