1997 Mercury Grand Marquis Owner Guide 1st Printing - Page 70

If the inside of the vehicle is very warm, drive for the first few minutes with the windows open to force the hot, stale air out of the vehicle. Fan speed can be reduced, after a comfortable temperature has been reached, to provide quieter system operation. To cool your vehicle using outside air, move the SELECT knob to NORM A/C, move the TEMP knob to the end of the blue range (full counterclockwise) and set the fan to the desired speed. Cooling your vehicle in this way provides quieter operation, but it is not as economical as MAX A/C. The instrument panel registers may be adjusted to control the quantity and direction of air being discharged. The thumbwheel controls the volume of air and the knob in the center of the register directs the air up and down or side to side. When the SELECT knob is moved to OFF, the system is off and the fan will not operate. Adjusting the panel register airflow The instrument panel registers may be adjusted to your comfort needs. The thumbwheel controls the volume of air and the control in the center of the register controls direction up or down or side to side. Electronic Automatic Temperature Control System The Electronic Automatic Temperature Control (EATC) module is located at the center of the instrument panel and operates only when the key is in the ON position. The EATC feature maintains the temperature you select and automatically controls the airflow for your comfort. It also allows you to override the automatic operation with manual override buttons. 69