1990 Honda Accord Owner's Manual - Page 48
1990 Honda Accord Manual
Page 48 highlights
For extra door window defrosting or defogging, select either the or (defrost) function, switch to the setting, and turn the fan on. Air will flow to the side door windows from the vents at each end of the dash when the vertical fins of the dash corner vents are pointed toward the windows, and the horizontal fins are moved upward. SIDE WINDOW DEFROSTER VERTICAL FIN ADJUSTMENT CONTROL DASH CORNER VENT After the windows are sufficiently defrosted, you may wish to select the or mode for more comfort. Sliding the temperature lever to the left or turning the temperature control dial counterclockwise will reduce the temperature of the air exiting the dash corner vents without appreciably affecting the heat to your leg and foot area. Continue to adjust the temperature and fan speed to find the most comfortable setting. To Turn Everything OFF Slide the temperature lever to the left or turn the temperature control dial counterclockwise all the way, turn the fan switch off and push the button on. NOTE: This setting should only be used in cold weather for the first few minutes of driving to prevent cold air from blowing into the cabin. Under normal operating conditions, the fan should always be kept ON to prevent the accumulation of stale air in the system.