Ford 1996 Contour Manual page 54

6
Have the exhaust and body ventilation systems checked
whenever:
your vehicle is raised for service
the sound of the exhaust system changes
your vehicle has been damaged in a collision
Improve your ventilation by keeping all air inlet vents clear of
snow, leaves, and other debris.
If the engine is idling while you are stopped in an open area
for long periods of time, open the windows at least one inch
(2.5 cm). Also, adjust the heating or air conditioning to bring in
outside air.
If you use the heater, set the fan speed on medium or high with
the function control knob turned to FLR, PNL/FLR or PANEL.
If you use the air conditioner, set the fan speed on medium or
high with the A/C button pressed. (Do not use MAX A/C.)
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