Air conditioners work to cool or warm your home to create a comfortable living environment. When operating your air conditioner, it is advised that a set point of 22 to 23 degrees be used in the summer months with a set point of 19 to 20 in the winter months, this will give comfortable temperatures in your home and help reduce energy costs. Set points below 20 degrees are not advised as these can cause the air conditioner to ice up and cause other issues within the system.