Why is my heating not working?

Why is my heating not working? If your heating is not working, it's probably due to issues with the following:

  • Air Flow
  • Heating or Furnace System
  • Thermostat Wiring
  • Thermostat Screen
  • Thermostat Functionality

To begin fixing your heating, continue to the Air Flow section.


Air Flow

C-Wire Go to your vents

What best describes the air coming out of your vents?


Furnace or Heating System

C-Wire Go to your home's circuit breaker


Make sure the breaker to the furnace is turned on

C-Wire 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.

C-Wire


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.

  • YES – Contact the manufacturer of your furnace, or contact Support at 1-855-733-5465 to find a pro-installer in your area.
  • NO – Continue to the next step.

C-Wire Go to your vents


6. Do you feel any air?

It doesn't have to be hot air.

  • YES – Continue to the Thermostat Wiring section.
  • NO – Contact Support at 1-855-733-5465 to find a pro-installer in your area.


Thermostat Wiring

C-Wire 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.

C-Wire


8. Do you have wires connected to any of the following terminals?

  • W: Continue to the next step.
  • O/B: Continue to the next step.
  • W-O/B: Continue to the next step.
  • W & O/B: Disconnect the wire connected to W and insert it into W2. Leave O/B alone. Continue to the next step.

C-Wire Go to your vents


9. Is your heating working now?

  • YES – Congratulations! You've fixed your heating! You are now complete.
  • NO – My heating isn't working, but I'm still feeling air flow. Continue to the Thermostat Screen section.

Thermostat Screen

Go to your thermostat

10. Does the thermostat show any of the following icons or messages?

  • "Heat"
  • "Heat On"
  • Fire Icon
  • Sun Icon

  • YES – Continue to the next step.
  • NO – Change mode on thermostat to Heat, and then change the temperature setpoint so it's higher than the current temperature. Afterwards, continue to the next step.


11. Check the thermostat screen again: are the icons or messages present?

  • YES – Continue to next step.
  • NO – Contact Support at 1-855-733-5465 to find a pro-installer in your area.


12. Are the icons or messages flashing?

  • YES – If the icons or messages are flashing, this means your compressor protection is on. Wait for 5 minutes until the icons or messages stop flashing, and then continue to the next step. If after 5 minutes, the flashing doesn't stop, contact Support at 1-855-733-5465 to find a pro-installer in your area.
  • NO – If the icons or messages aren't flashing, this means your heat should be working. Continue to the next step.

C-Wire Go to your vents


13. Is your heating working now?

  • YES – Congratulations! You've fixed your heating! You are now complete.
  • NO – Contact Support at 1-855-733-5465 to find a pro-installer in your area.


Thermostat Functionality

C-Wire Go to your thermostat


14. Switch your thermostat from Heating to Cooling.

C-Wire Go to your vents


15. What temperature do you feel blowing from the vent?

  • COLD – This means your thermostat is cooling correctly, but the heating isn't working properly. Contact Support at 1-855-733-5465 to find a pro-installer in your area.
  • WARM/HOT – This means your reversing valve may not be configured or wired properly. Continue to the Thermostat Wiring section.


Fan

C-Wire Go to your thermostat


16. Turn your fan mode on.

C-Wire Go to your vents


17. Is your heat working at full force (not weak)?

  • YES – There's nothing wrong with your system, but it's not correctly configured. Contact Support at 1-855-733-5465 to find a pro-installer in your area.
  • NO – Continue to the next step.

C-Wire 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.

C-Wire


19. Do you have a wire connected to the G-Terminal?

  • YES – Since you have a G-Wire, but your fan isn't working properly, your system may need servicing. Contact Support at 1-855-733-5465 to find a pro-installer in your area.
  • NO – You require a G-Wire to run your fan. Contact Support at 1-855-733-5465 to find a pro-installer in your area.


Last updated: September 17, 2018
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