Check that the heating, ventilating and air conditioning (HVAC) system are working properly as heating and cooling performance is critical for interior comfort and for safety reasons, such as defrosting. Fall is also a great time to check your air filters. Wiper blades that are torn, cracked or don’t properly clean your windshield should be replaced. As a general rule, wiper blades should be replaced every six months. When changing the blades, be sure to also check the fluid level in the windshield washer reservoir.