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Why is my heating not working? If your heating is not working, it's probably due to issues with the following:
To begin fixing your heating, continue to the Air Flow section.
Air Flow
Go to your vents
What best describes the air coming out of your vents?
Furnace or Heating System
Go to your home's circuit breaker
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.
3. 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.
4. 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.
5. Are there any error lights on the furnace?
Most furnaces have lights on them. When there's an error, this light will flash or blink rapidly. There's typically an error code reference guide inside the furnace cover.
Go to your vents
6. Do you feel any air?
It doesn't have to be hot air.
Thermostat Wiring
Go to your thermostat
7. 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.
8. Do you have wires connected to any of the following terminals?
Go to your vents
9. Is your heating working now?
Thermostat Screen
Go to your thermostat
10. Does the thermostat show any of the following icons or messages?
11. Check the thermostat screen again: are the icons or messages present?
12. Are the icons or messages flashing?
Go to your vents
13. Is your heating working now?
Thermostat Functionality
Go to your thermostat
14. Switch your thermostat from Heating to Cooling.
Go to your vents
15. What temperature do you feel blowing from the vent?
Fan
Go to your thermostat
16. Turn your fan mode on.
Go to your vents
17. Is your heat working at full force (not weak)?
Go to your thermostat
18. 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.
19. Do you have a wire connected to the G-Terminal?
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