This summer, whether you have a manual thermostat or a smart device, you have a few fan settings to help keep your home cool and comfortable. The fan setting on your device controls your AC system's blower and determines how often air circulates throughout your home. Let's take a look at some of the fan settings on your system.

Air Conditioner Setting

So, what does the fan do on an AC unit? If your HVAC system runs on a central thermostat, the device controls your heating and cooling system. When your thermostat is switched to the air conditioning setting, your system will produce cool air. In many cases, this setting is denoted by the words "cool" or "air." The thermostat will call the system for cool air until the desired temperature is reached based on your desired setting.

When your thermostat is in the cool mode, the air is cooled by the system refrigerant, and the fan sends the cool air through your ductwork and vents. At the same time, the air is also being pulled in through your air filters to clean your indoor air and cool it down.

Air Conditioner Fan Mode

Aside from heating and air, your thermostat is also equipped with a fan mode setting. The fan of your AC unit is connected to your system's indoor air handler. The fan is responsible for drawing in the warm air in your home and passing it over the condenser. The air will return to the air handler, where it is cooled and recirculated into your home. The fan mode setting can be used to circulate cool air throughout your home. However, this setting will not produce the same cold air as the AC setting. This setting can work with ceiling fans and other devices to help with air circulation.

Auto and On Settings

When you switch the setting to "on," it means that the fan will be on and constantly blowing air. Some systems come with a constant low-speed setting. When the fan is switched on, it will circulate air based on the setting on your thermostat. This means that if you have the air conditioner engaged, the fan will blow continuous cool air. The "on" setting can be used when you want to keep the air in your home consistent. As an example, you might want the cooler air in the basement and the warmer air in the upstairs to be more balanced. Additionally, in the "on" fan setting, your air is continuously moving through your home's air filtration system and will help keep your indoor air clean. You might also be able to reduce some of the wear and tear on your AC system by cutting down on the start and stop cycles. Consequently, you may experience higher energy bills, more frequent filter changes, and the need for more service if you leave your system in the "on" position.

The auto fan setting on your thermostat is the energy-saving mode that turns your air conditioner on automatically when it is needed. Once your home reaches the desired temperature, your system will shut down until it is needed again. This setting will save you money on your energy bill, but it may not always distribute air evenly.

In auto mode, your fan is only running when needed. This means that your air filters may not need to be replaced as often since less air is circulating. In addition, you will also experience greater control over your system, with temperature settings determining when your fan turns on.

Your thermostat has several settings for the fan on your HVAC system. Deciding which setting is right for your home will be determined by your situation and preferences. You can contact an HVAC technician to help you better understand how to maximize your AC unit.