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Q&A

Should my furnace fan be auto circulating?

Should my furnace fan be auto circulating?

Keeping your fan on AUTO is the most energy-efficient option. The fan only runs when the system is on and not continuously. There is better dehumidification in your home during the summer months. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside.

How do I run the fan only on my thermostat?

Turn your fan on manually

  1. Press your thermostat ring to open the Quick View menu.
  2. Select Fan .
  3. Turn the ring to select how long you’d like your fan to run.
  4. If you have a multi-speed fan, you’ll also be able to set your fan speed.
  5. Your fan will turn off automatically after the time you’ve selected.

Why does my thermostat not work on auto?

The reason why your thermostat is not heating on in auto mode could be because there is something wrong with the blower. Another possibility is that your thermostat may be faulty. If that is the case, then you may be in due for a replacement. Before you make this decision, you will have to properly get it checked.

Why does the fan turn on when the furnace is on?

This will cause the fan to automatically turn on when the furnace is heating and shut off once the call for heat stops. If your fan limit switch was already set to AUTO (not pressed in), then you most likely either have a problem with your thermostat wiring or the fan limit switch is bad.

What to do when a furnace blower fan won’t start?

Tie the red and white wires together, and switch the power on. If the furnace starts, the problem is either with the thermostat wire or thermostat. Replace the wire or thermostat to fix the problem. Your furnace blower fan not starting can have a few causes as you see here.

Can a furnace be run with only a fan?

If you want separate control of the fan, you’re going to need at least one more wire. As it currently sits, the fan is being controlled by the furnace control module, or internal furnace wiring. The thermostat simply tells the furnace when it’s cold, and the furnace orchestrates turning on the heat and fan.

Why is my thermostat fan not turning off?

Older thermostat wire can have degraded insulation. When the insulation is gone, the wires touch inside the thermostat wire bundle. In this case, the red and green wire would be touching somewhere in the bundle. For a quick check (and hopefully to resolve the issue), check the thermostat wire terminations at the thermostat and the furnace.

Why is my fan not turning on?

If the fan doesn’t start up at all it could be something as simple as a setting on the thermostat. Make sure that the power is turned on and that the settings are calling for ‘cooling’. If all the settings are correct but the fan doesn’t start it could be an overheated or damaged fan motor.

What would cause the furnace blower not to turn on?

1 – Low airflow Dirty Air Filters. If you don’t change your air filters often enough, the filters will become dirty and clogged, which means the heat exchanger retains heat and eventually causes it Dirty Blower Wheel. If your furnace goes on and off too quickly, it could be a dirty blower wheel. Closed or Blocked Air Supply Vents.

What to do if your Furnace isn’t working?

  • Increase the temperature by five degrees and check if it follows suit.
  • Check that it isn’t being affected by sunlight or other heat sources providing false information to the furnace.
  • Ensure the batteries are fresh.

    Why is my furnace not working?

    • reset and allow time for a normal heating cycle.
    • you may be cold but your furnace thinks everyone is cozy at 50 degrees.
    • Always check the furnace filter.