Pontiac 1953 Owner's Manual page 22

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Using the Fan-The
"FAN"
switch
(located at the
right
end
of
the heater
control
panel)
when
moved to the "ON"
position
assists
in
circulating
air
for both the heater and defroster. Use
of
the "FAN"
is unnecessary
for
normal
driving
conditions,
because ample air
is
forced into the
system
by
the
forward
motion of the
car.
The
"FAN"
should be
used when
the
car
is driven slowly or
is
stopped,
to speed up de-icing
of
the
windshield, to
prevent
fogging of
the
windows when carrying several
passengers,
or
to
provide forced
air
ventilation
when it
is
necessary to keep the car windows closed while
driving
in a summer
rainstorm.
NOTE:
Unde~
very adverse weather
conditions,
window defoggina
or
wind-
shield de-Iclna may
be
improved by openlna the ventilators (especially
the rear ones
on
4 door sedans)
or
the rear windows may be lowered
approximately
311
Inch.
The following are
examples of
heater control
panel settings for various
types
of
driving
conditions:
NORMAL DRIVING WINTER OR SUMMER
To
get best results from your Venti-Heat System,
make
the following
settings on the control panel
:
"AIR"
..... .
....
.
Set lever
at
"
NORMAL"
"TEMP" .
.
...
.
....
.
:
..
. Set lever at temperature desired
in
car
"FAN" .
....
...
..
.
.
.
.
.
. Switch
"OFF"
The above settings should
not
be changed except
for
abnormal driving
conditions.
It should
be noted that
when
a.
window ventilator
is
opened it will
draw heated
air from
inside
the
car.
DE-ICE WINDSHIELD
"AIR". .
.
.
....
...
Set
lever
at
"DE-ICE"
"TEMP"
.
.
.
.....
.
.
.
.
.
. :
Set
lever.
at "HIGH"
"FAN"
..
.....
.
..
.
..
..
.
Switch
"ON"
SUMMER RAINS OR SLOW CITY TRAFFIC
" AIR" .
...
.
..
.
......
.
.. Set
lever
at
" NORMAL"
"TEMP"
. . .
.
.
.
... Set
lever
at
" OFF"
"FAN" .
...
..
...
..
..
:
..
Switch "ON"
The
"AIR"
lever should
be left
at "NORMAL"
to help
prevent that
moist
sticky feeling
usually
experienced
in
such weather. The
"FAN
"
switch can be turned
" OFF"
after
leaving
the slow city
.
traffic.
This will conserve electric current and
motor life.
[ 191

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