1994 Buick Skylark Owner's Manual - Page 129

B/L (Bi-level) This setting allows the outside air flow through your to Buick in two ways. Coolerair is directed to the upper portion of your body through the vent outlets. Slightly warmer air is directed through the heater ducts and defroster outlets. Vent Using vent will allow outsideair to flow through the instrwnent panel outlets. '- Rear WindowDefogger (Option) The lines you see on the rear window warm the glass. Press the button to start warming your window. Pressingthebutton again will shut it off. Heater This setting sends mostof the air through the heater ducts. Adjust the temperature control to warm setting. a If you turn on the rear defogger while driving or at If you have the engine coolant heater, you can use it in above 45 mph (72 km/h), it will stay on as long that as cold weather (+2OoF/-8"C or lower)to heat your speed is maintained. You must press the button shut it to vehicle's passenger area quicker. engine coolant The 0 off. If you drive below 45 mph for more than 1 minutes heater warms the engine coolant which will ultimately warm the passenger area more efficiently. (See "Engine the rear defogger will automatically shut off. .(. Coolant Heater" in the Index.) Blend NOTICE: This setting divides the air flow equally between the Scraping the insideof your rear window could heater and the defroster outlets. cut and damage the heater. Your warranty would Windshie1d:Defrost not cover this damage. Don'i put decals there; you might have 'to scrape them ...off. This setting operates the defroster. Most the air comes of out near the windshield. Use defrost when you get fog or ice on the windshield.