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If your cooling is not working, it's probably due to issues with the following:
To begin fixing your cooling, continue to the Air Flow section.
Air Flow
Go to your vents
1. What best describes the air coming out of your vents?
Go to your compressor
Compressors are large fans inside a box, usually found outside at the side of homes.
2. Is the compressor running?
Thermostat Wiring
Go to your thermostat
3. Remove your existing thermostat from the wall plate
On most thermostats, you can take off the thermostat by grasping and gently pulling. Some thermostats may have screws, buttons, or clasps.
Note: Don't remove any wires from your thermostat at this time.
4. Look at the terminals that have connected wires. Do you have any of the following terminal configurations?
5. Make sure the wires are connected
Gently tug on the wires to make sure they are connected to the terminals.
Go to your vents
6. Is your cooling working now?
Furnace or Heating System
Go to your home's circuit breaker
7. Make sure the breaker to the furnace is turned on
Go to your furnace or heating system
This system is often located in your basement, attic, or garage.
8. Make sure your furnace is turned on
There's usually a switch next to your furnace that turns it on or off. It sometimes looks like a light switch.
9. Make sure the furnace cover is closed.
Be sure the cover is completely closed. Some systems won't power up if the cover isn't fully closed.
Go to your vents
10. What best describes the air coming out of your vents?
Thermostat Device
Go to your thermostat
11. Does the thermostat show any of the following icons or messages?
12. Does the thermostat show any of the following low-power icons or messages?
A Low-Battery icon or "I Don't Have Power…" message.
13. Go to your vents
Is your cooling working now?
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