What should I do if ice is forming on the cooling coil?

If ice is forming on the cooling coil, the outdoor temperature may be below 60°F (16°C), the Dust filter may be dirty, or the temperature setting may be too low for night-time cooling. To defrost the coil, set the unit to FAN ONLY mode. You should also clean the Dust filter or replace the PureAir™ filter if it is dirty.