The Cooling Thermostat controls cooling fans to maintain the room temperature at a value corresponding to the day or night set points. Day & Night Temperature Set Points: 50¡F to 100¡F (10¡C to 38¡C). 3-position slide switch to select differential: +/- 2¡F: Fan will start 2¡FÊabove set point and will stop 2¡FÊbelow set point, +/- 4¡F: Fan will start 4¡FÊabove set point and will stop 4¡FÊbelow set point and+/- 6¡F: Fan will start 6¡FÊabove set point and will stop 6¡FÊbelow set point.