When furnace turns off blower will continue to run?

The blower on a furnace is designed to circulate the heated air throughout the room or house. It is typically controlled by the thermostat and will turn on when the furnace begins to heat the air and turn off when the desired temperature is reached. Most furnaces also have a setting for the blower to continue to run after the furnace has turned off, this is called the "continuous fan" or "fan only" setting.

The continuous fan setting can be useful for circulating air in the house and helping to maintain a consistent temperature throughout. It can also help to improve air quality by circulating air through the filter. However, it is important to note that the continuous fan setting can also increase energy usage.

If you are unsure of whether or not you should use the continuous fan setting on your furnace, you can consult with your local HVAC contractor.