The number 6 alone does not provide enough context to determine what action should be taken. It is unclear if the temperature is measured in Celsius or Fahrenheit, and what is considered "cool" can vary depending on personal preferences and the climate in the region.

If the temperature is 6 degrees Celsius (42.8 degrees Fahrenheit) in a cool room, it could still be comfortable for some people. In such cases, no action may be needed.

On the other hand, if 6 degrees Celsius (42.8 degrees Fahrenheit) is considered uncomfortably cold, then an appropriate course of action might be to adjust the thermostat to increase the temperature or to add extra layers of clothing for personal comfort.