2003 Buick Rendezvous Owner's Manual - Page 184

You may notice a slight change in engine performance when the air-conditioning compressor shuts off and turns on again. This is normal. The system is designed to make adjustments to help with fuel economy while still maintaining the selected temperature. On hot days, open the windows to let hot inside air escape; then close them. This helps to reduce the time it takes for your vehicle to cool down. It also helps the system to operate more efficiently. For quick cool down on hot days, do the following: 1. Select the vent mode. Defogging and Defrosting 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 the defrost mode to remove fog or frost from the windshield more quickly. Use the MODE button to select the defog mode. +3(Defog): This mode directs air to the windshield and the floor 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. The recirculation mode cannot be selected while in the defog mode. Press the defrost button to select defrost. (Defrost): Pressing this button directs most of the air to the windshield and the side window outlets, with some air directed to the floor outlets. In this mode, the system will automatically turns off recirculation -.-A -..- +LA a-:" m-.-.rl;*;n-;-m TrAmnrPCCnr IU I U I I u t1 E~!S.CC the outside temperature is at or below freezing. Recirculation cannot be selected while in the defrost mode. -Gut lulklwl1tt 1 3 2. Select the recirculation mode. 3. Select the coolest temperature. 4. Select the highest fan speed. Using these settings together for long periods of time may cause the air inside of your vehicle to become too dry. To prevent this from happening, after the air I1 I>ILlt; !---!-I- VI -1 .--..I yuul .--h:-l- V G I I I ~ I GI I U 3 h n m nrrnlnrl + s u m +ha rapirplIlo+inn CIUUI~U, U I I I L I# I" . " V a l Vu.--.-. . vvvvl, mode off. The air-conditioning system removes moisture from the air, so you may sometimes notice a small amount of water dripping underneath your vehicle while idling or after turnix~ the engine. This is norma!. zlf: 3-33