1993 Chevrolet Astro Owner's Manual - Page 129

Heating System PO450 If your vehicle does not have air conditioning, systemwill look like. this is what your heating Fan Lever Thetopleverhasfivepositions. To increase the air flow, move the lever toward HIGH. To decrease the airflow,move it toward OFF. Temperature Lever The left lever lets you select the temperature of the air flowing into your vehicle.Movetheleverupforwarmerair.Movetheleverdownforcoolerair. Function Lever The right lever can be moved to four different functions. Defrost: The setting with the defrost symbol operates the defroster. Most of the air comes out near the windshield, with some going to the floor vents. Use this when you get fog or ice on the windshield. HTR (Heater): Mostof the air comes out near the floor. The rest comes out from the defroster vents under the windshield and at the front sidewindows. This is best for cold weather. VENT: The air comes out at the vents on your instrument panel and at your front side windows. BLEND: With this setting,theheatedoutsideaircomesoutbetweenthe heater vents and defroster vents with some air coming through the side vents. Adjust the temperature lever for warmer or cooler air. 3-5