What Does Cool Mode Mean On An Air Conditioner. Cool mode is the most frequently used setting on an air conditioner. I assume you mean when the vent oscillates back and forth on a window style air conditioner.

The Cool mode is the primary setting of most air conditioners by default. Dry mode allows the AC to reduce the humidity in the air. Aircon fan mode is more economical since in this mode the unit does not run with the compressor on.
Humidity or the amount of moisture in the air feels to the skin like an increase in temperature.
This mode will run your AC steadily to maintain the temperature and fan speed as you set them. Either way it simply means that the system is in cooling mode. The Difference Between Dry Mode and Cool Mode. Cooling Mode Symbols Some thermostats will indicate the air conditioning is on with clear text that reads AC On or Cool On Other thermostats may use snowflake symbols to indicate the same thing.

