In general, air conditioners operate in two modes: cooling mode and fan mode. While each model may have specific features and settings, I can provide you with some information about how air conditioners typically work in fan mode.
When an air conditioner is set to fan mode, it usually circulates and recirculates the air already present in the room. The primary purpose of the fan mode is to move the indoor air around without cooling or dehumidifying it. The air conditioner's compressor, which is responsible for cooling the air, is usually not active in fan mode.
Air conditioners typically have a ventilation system that can be set to draw in fresh air from the outside. However, this ventilation feature is separate from the fan mode. In fan mode, the air conditioner usually does not bring in air from the outside; instead, it recirculates the indoor air to maintain airflow and provide some level of comfort.
It's worth noting that the specific functionality and features of an air conditioner can vary depending on the manufacturer and model. Therefore, it's always advisable to consult the user manual or contact the manufacturer directly to understand the precise operation of a particular air conditioning unit.