Functional Control Lever Does Not; Maximum Cooling Position - Ford COUGAR 1968 Shop Manual

PART 16-2
-
Air Conditionin
Refer to insufficient, erratic or no
cooling under performance conditions
-
basic A/C system. Check the A/C
system as indicated.
IF NOT OK
Repair or replace worn or damaged
parts, as required.
FUNCTIONAL CONTROL LEVER
DOES NOT OPERATE A/C
DOORS PROPERLY IN
MAXIMUM COOLING POSITION
-FALCON, FAIRLANE, AND
MONTEGO
Verify the complaint. Apply parking
brakes. Position transmission lever in
neutral or park position. Operate the
engine at 1500 RPM. Position the
functional control lever in the "Max".
Position blower on high speed and
the temperature control lever in the
"Cool" position. Check the 'position
of the .doors to see if they a r e as
follows:
1. Outside-recirculating door-
closed.
2. A/C-heat door-closed.
3. Heat-defrost door-closed.
If the doors are not in the position
indicated above, check for specified
vacuum (I4 inch HG) with the vacuum
leak probe connected between the vac-
uum tank hose (black) and the vacuum
tank:
If vacuum is not to specification at
this location, check for vacuum com-
ponent leakage between the connector
on the engine, check valve, vacuum
supply tank and the vacuum line
(black) at the control assembly.
I F NOT OK
Repair or replace faulty component
causing vacuum leakage. Check the
door positions.
Check the door positions. If a door
is not positioned as indicated above,
check for vacuum at the applicable
vacuum motor.
No vacuum should be present at the
heat-defrost door motor (red). If vac-
uum is present, check for improper
(crossed) or leaking hose connections
at the control assembly.
Vacuum (14 inch
HC)
should be
present at the outside recirculating
door motor (white) and the A/C-heat
door motor (blue). If no vacuum is
present, check for improper (crossed)
or leaking hose connections at the wa-
ter valve vacuum switch, T-connectors
or control assembly. If' the tiose con-
nections are installed properly, the
control assembly is faulty and should
be replaced.
IF NOT OK
Connect vacuum lines to proper
control assembly fitting, if required.
Replace control assembly, if required.
Check doors for proper operation.
If no vacuum is present at the heat-
defrost door motor (red), check the
door operation by hand for a binding
or obstructed condition.
If vacuum (14 inch HG) is present
at the outside recirculating door motor
(white) and the A/C-heat door motor
(blue), check the operation of the door
by hand for binding or obstructed
conditions.
IF NOT OK
Correct the cause of obstruction or
bind condition (if required). Lubricate
door edges and plenum. chamber con-
tact surfaces with Lubriplate. Lubri-
cate door pivot points. If door was
not obstructed or binding, replace the
applicable door motor. Check the
doors and control system for proper
operation.
FUNCTIONAL CONTROL LEVER
DOES NOT OPERATE A/C
DOORS PROPERLY IN FRESH
POSITION-FALCON, FAIRLANE,
AND MONTEGO
Verify the complaint. Apply parking
brakes. Position transmission lever in
neutral or park position. Operate the
engine at 1500 RPM. Position the
functional control lever in the fresh
position, blower on high speed and
the temperature control lever in the
cool position. Check the position of
the doors to see if they are as*follows:
1. Outside-recirculating door-
open.
2. A/C-heat
door-closed.
3. Heat-defrost door-closed.
If the doors are not in the positions
indicated above, check for specified
vacuum (14 inch HG) with the vacuum
leak probe connected between the vac-
uum tank hose (black) and the vac-
uum tank.
If vacuum is not to specification at
this location, check for vacuum com-
ponent leakage between the connector
on the engine, check valve, vacuum
supply tank and the vacuum line
(black) at the control assembly.
I F NOT OK
Repair or replace (as requ~red) faulty
component causing vacuum leakage.
Check the doors and controls for pro-
per operation.
Check the door positions. If a door
is not positioned as indicated above,
check for vacuum at the applicable
vacuum motor.
No vacuum should be present at the
outside recirculating door motor
(white) and the heat-defrost door
motor (red). If vacuum is present,
check for improper (crossed) or leak-
ing hose connections at the control
assembly.
Vacuum (14 inch
HC)
should be
p r e s e n t a t t h e ~ / C - h e a t
door motor (blue). If no vacuum is
present, check for improper (crossed)
or leaking hose connections at the wa-
ter valve vacuum switch, T-connectors
or control assembly. If the hose con-
nections are installed properly, the
control assembly is faulty and should
be replaced.
I F NOT OK
Connect vacuum lines to proper
control assembly fitting, if required.
Replace control assembly, if required.
Check doors for proper operation.
If no vacuum is present at the out-
side recirculating door motor (white)
and the heat-defrost door motor (red),
check the door operation by hand
for a binding or obstructed condition.
If vacuum (14 inch HC) is present
at the A/C-heat door motor (blue),
check the operation of the door by
hand for a binding or obstructed
condition.
IF NOT OK
Correct the cause of obstruction or
bind condition (if required). Lubricate
door edges and plenum chamber con-
tact surface with Lubriplate. Lubri-
cate door pivot points. If door was
not obstructed or binding, replace the
applicable door motor. Check the