2004 Chevrolet Corvette Owner's Manual - Page 144
2004 Chevrolet Corvette Manual
Page 144 highlights
Defogging and Defrosting Fog on the inside of windows is a result of high humidity (moisture) condensing on the cool window glass. This can be minimized if the climate control system is used properly. There are two modes to clear fog or frost from your windshield. Use the defog mode to clear the windows of fog or moisture and warm the passengers. Use FRONT to remove fog or frost from the windshield more quickly. Press the MODE button until the defog mode appears on the display. 1 FRONT: - (Defog): This mode directs the air equally between the windshield and the floor outlets with a small amount to the side window outlets. When you select this mode, the system turns off recirculation and runs the air-conditioning compressor unless the outside temperature is at or below freezing. An indicator light in the A/C button will come on to let you know that the air-conditioning compressor is activated. The recirculation mode cannot be selected while in the defog mode. Pressing this button directs most of the air to the windshield, with a small amount directed to the side window outlets. The light on the button will come on and the digital display will show the defrost mode symbol and fan speed when the front defrost mode is being used. In this mode, the system will automatically turn off the recirculation and run the air-conditioning compressor, unless the outside temperature is at or below freezing. An indicator light in the A/C button will come on to let you know that the air-conditioning compressor is activated. Recirculation cannot be selected while in the defrost mode. Pressing this button again will return the system to the last operating mode and the air intake mode will be in outside air. If the system is in FRONT defrost when you shut the engine off, it will restart in FRONT defrost unless the engine is off for longer than 40 minutes. If the engine is off longer than 40 minutes, the system will restart in the operating mode that was set prior to FRONT defrost and the air intake mode will be in outside air. Do not drive the vehicle until all the windows are clear. 3-30