Thermostat Settings for HVAC System – “On” vs “Auto”

Most people head right for the “auto” switch when controlling the temperature in their home. It can be quite tempting to crank up the air conditioning during these humid Massachusetts’ summers. However, simply using the “on” switch just might suffice, even on a warm summer afternoon.

What is the Difference Between “On” and “Auto?”

When the thermostat is set to “auto,” the fan only runs during the home’s heating and cooling cycles. The fan will automatically shut off when the home has reached its desired temperature.

If the fan is set to “on,” however, it won’t turn off until you adjust the thermostat. Regardless if the home has reached its heating and cooling cycle, you can expect that fan to run.

The Pros & Cons to Setting the Fan to “On”

Air goes through the filtration or the UV light system when the fan is on. When the fan is off, the system cannot clean the air as it has been designed to do. Heating and cooling is more evenly distributed throughout the air when the fan is on.

On the other hand, it can cost quite a bit of money to run your fan around the clock. The filter can clog up and you might have to adjust your filter frequently.

The Pros & Cons to Setting the Fan on “Auto”

One of the major benefits to using the “auto” setting is that it utilizes less energy. This is because it will keep the fan running at a slow speed in less amount of time.

When the “auto” setting is on, there will be less of an even circulation of hot and cool air. After the thermostat has been adjusted, the fan will stop pushing around air to different spaces in the house.

If you need an HVAC system in Massachusetts, contact Winters® Home at 617-221-5899. Our office is located in Boston but we offer HVAC services to several areas in MA. Whether you need air conditioner repair, replacement or installation services. We also provide heating services, drain repair, emergency plumbing and more!