Mercury Sable 1999 Owner's Manual page 28

Controls and features
Remove any snow,
ice or leaves from
the air intake area
(at the bottom of
the windshield).
If your vehicle has been parked with the windows
closed during hot weather, the air conditioner will
do a much faster job of cooling if you drive for
two or three minutes with the windows open. This
will force most of the hot, stale air out of the
vehicle. Then operate the air conditioner as you
would normally.
If the air conditioner works well in MAX A/C but
not in normal A/C, this may indicate that the
cabin air filter (if equipped) needs to be replaced.
When placing objects on top of your instrument
panel, be careful to not place them over the
defroster outlets. These objects can block airflow
and reduce your ability to see through your
windshield. Also, avoid placing small objects on
top of your instrument panel. These objects can
fall down into the defroster outlets and block
airflow and possibly damage your climate control
system.
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