Description And Operation; Montego. Falcon And Fairlane - Ford COUGAR 1968 Shop Manual

16-12 GROUP 16
-
Ventilating, Heating, And Accessories
1 DESCRIP'TION AND OPERATION
Refer to Wiring Diagram Manual wiring harnesses. Schematics are
MONTEGO, FALCON,
Form 7795P-68 for locations of shown in Group 19 of this manual. AND FAIRLANE
SYSTEM OPERATION
CLUSTER ASSEMBLY
BLACK
TO A/C
TGRMOSTAT
FIG. I
-Montego A/C-Heater Control Assembly
R E D
B L U E .
BLACK
WH I
TO'AIC
ICING SWITCH
FIG.
2-Falcon A/C-Heater Controls
Outside air is drawn in from the
cowl through the outside air door
into the right vent duct, into the
blower scroll, forced through the'eva-
porator core, through and/or around
the heater core then mixed and dis-
charged through either the A / C air
duct or the heat-defrost plenum air
outlet, depending on the position on
the control setting.
The temperature door is located to
the left of the evaporator core and to
the rear of the heater core in the left
side of the case.
The A/C-heat door is located in
the left rear corner of the case, and
the heat-defrost door is in the plenum
chamber attached to the rear face of
the case assembly.
A single defroster nozzle leading
to two openings in the instrument
panel is attached directly in the
plenum chamber with a clip.
The A / C registers located in the
1 8 1 4 - C
lower instrument panel are located;
one to the far left; one to the far
right; and a double register in the
center.
The A/C registers are egg-crate
type registers with vertical and
horizontal vanes.
The blower motor and wheel as-
sembly is located in the blower scroll
immediately forward of the right
vent duct assembly. The evaporator
core is located in a diagonal position
in the center of the case; and the
heater core in a diagonal position in
the left side of the case.
Vacuum actuators that operate the
normal-recirc door in the right vent,
and the A/C-heat door, are con-
trolled by a vacuum selector on the
control head assembly.
CONTROLS
The air temperature is controlled
by the location of the temperature
lever in the control assembly (Figs.
I, 2 and 3). As the lever is moved
from cool to warm, a cable moves
the temperature (blend) door from
maximum cooling position to mini-
mum cooling position. With the
functional control lever in either
A / C position, the right water valve
(yellow dot) is closed. A vacuum
K 1 8 5 0 - C
switch on the evaportor case is act-
uated to supply vacuum to close the
left water valve (blue dot) when the