1999 Chevrolet Corvette Owner's Manual - Page 173

yellowblue 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 you had set prior to FRONT defrost. The air conditioning cools and dehumidifies air coming into the vehicle. It also operates in defrost to help remove moisture from the vehicle. The air conditioning does not operate at temperatures below approximately 35_F to 40_F (2_C to 4_C). If the system is operating in the AUTO mode, turning the air conditioning off will delete AUTO from the digital display and show current mode and fan settings. The AUTO button must be pressed to return to the automatic mode operation. See "Rear Window Defogger" later in this section for more information. Sensors The Automatic Electronic Dual Climate Control System uses several sensors to control operation and display information. Solar Load Sensor This sensor is located on the top right side of the defroster grille. The defroster grille is on the top of the instrument panel. The sensor monitors the sun's solar radiation and uses this information as part of the automatic climate control system when operating in the AUTO mode. Be careful not to put anything over the sensor. When covered, the sensor cannot compensate for changes in the amount of heat the vehicle is absorbing from the sun. 3-9