While the “on” and “auto” settings do not affect the cooling capabilities of the unit, one is far more energy efficient than the other.
There are benefits to having your air conditioner set to “auto” and “on.” The benefits of the “auto” setting include higher efficiency, lower energy bills, better humidity control, less wear and tear on some components, and quieter running.
There are benefits to having your air conditioner set to “auto” and “on.” The benefits of the “auto” setting include higher efficiency, lower energy bills, better humidity control, less wear and tear on some components, and quieter running.
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.
Turning on the auto mode in your air conditioner simply means that the unit's fan is only going to start running when it needs to either cool or heat the room to your desired temperature. To make this happen, the fan will use varying speeds to give you the closest cooling or heating effect that you want to have.
In AUTO mode, the fan shuts off between cooling cycles. This allows more moisture from humid air inside your home to collect and drain outside, which leads to lower indoor humidity.