GENERAL
E36
cars
are
equipped
with
integrated
automatic
heating
and
air
conditioning
systems
.
Many
of
the
procedures
given
in
this
repair
group
require
that
the
A/C
refrigerant
charge
be
evacuated
using
specialized
equipment
.
See
A/C
System
Warningsand
Cautions
later
in
this
repair
group
.
HEATER
AND
CONTROLS
Blower
motor,
removing
and
installing
NOTE-
On
6-cylinder
cars,
the
plastic
top
enginecover
and
fuel
rail
covermustbe
removed
.
The
fuel
injectorhamess
re-
taining
screws
must
be
removed
and
the
harness
set
aside
.
The
engine
control
module
(ECM)
cover
must
be
removed,
the
control
unit
connectors
unplugged
and
the
harness
pulled
out
of
the
way
.
See
130
Fuel
Injection
.
1
.
Disconnect
negative
(-)
cable
from
battery
.
2
.
Open
hood
.
Unclip
engine
bulkhead
plenum
grille
at
base
of
windshíeld
and
remove
grille
.
See
Fig
.
1
.
HEATING
AND
AIR
CONDITIONING
640-1
640
Heating
and
Air
Conditioning
GENERAL
.
...
.
....
.
.
.
.
.
.
.
.
.
.......
.
.
.
640-1
Heater
andA/C
air
distribution
motor,
replacing(rotary-knob)
.
.
...
.
.
.
.......
.
640-10
HEATER
AND
CONTROLS
.
.....
.
.
.
.
.
.
.640-1
Rear
Window
Defogger
.
.
.
.
.
.
.
.
.
.
...
.
.
.
640-10
Blower
motor,
removing
and
installing
.
.
.
.
.
.
640-1
Rear
Window
Blower
(convertible
models)
.
.640-10
Blowermotor
resistor
pack,
replacing
.
.
.
.
.
.
640-3
AIR
CONDITIONING
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-11
Heater
valve,
replacing
...........
.
.
.
.
.
.
.
640-3
Heater
box,
removing
and
installing
.
.
.
.
.
.
.
.
640-4
A/CSystem
Warnings
and
Cautions
.
.
.
.
.
.
:640-11
Heater
core,
replacing
.....
.
.
:
....
.
.
.
.
.
.
.
640-6
A/C
compressor,
replacing
.
.
::.
:
:
.
.
.
.
.
.
.
.640-12
Heater
core
temperature
sensor,
replacing
.
.
640-7
A/C
Compressor
Clutch
.
.
.
.
.
.
.
:
.
.
.
.
.
.
.
.
.
640-13
Heater
andA/C
Control
Head
.
.
....
.
.....
.
640-7
A/C
condenser,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-14
Heater
andA/C
control
head,
removing
A/C
receiver/drier,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
640-15
and
installing
(rotary-knob)
.
.
....
.
......
640-7
A/C
expansion
valve,
Heater
andA/C
control
head,
removing
removing
and
installing
...
.
.....
.
.
.
.
.
.
.
640-16
and
installing
(digital-display)
.
.....
.
.....
640-8
A/C
evaporator,
removing
and
installing
.
.
..
640-17
Heater
andA/C
control
module,removing
A/C
evaporator
temperature
sensor,
and
installing
(rotary-knob)
.
.
...
.
.
.
.
.
.
.
.
640-8
replacing
.
.
.
.
.
.
..............
.
.
.
.
.
..
640-17
Heater
andA/C
control
module,removing
A/C
microfilter,
replacing
......
.
....
.
.
.
..
640-18
and
installing
(digital-display)
.
...
.
.
.
.
.
...
640-8
Sensor
fan
for
interior
temperature,
TABLES
replacing
.
.
.
....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-9
a
.
Blower
Motor
Test
Values
.........
...
.
.
......
640-3
Heater
andA/C
AirDistribution
Motors
.
.
.
.
.
.
640-9
b
.
Heater
Core
Temperature
Sensor
Test
Values
...
.640-7
c
.
Evaporative
Temperature
Sensor
Test
Values
...
640-17
d
.
A/C
System
Fluid
Capacities
(total)
..
..........
640-18
0012527
Fig
.
1
.
Detach
grille
retaining
clips
(arrows)
and
pull
grille
upward
and
out
of
rubbergasket
.
CAUTION-
Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautionsgiven
at
the
front
of
this
manual
onpage
viii
.
HEATER
AND
CONTROLS
640-2
HEATING
AND
AIR
CONDITIONING
3
.
Remove
wiring
harness
retaining
clip
at
bulkhead
.
Re-
move
screws
retaining
wiring
harness
cover
and
pull
cover
forward
.
See
Fig
.
2
.
0012529
Fig
.
2
.
Ming
harness
cover
screws
at
base
ofwindshield
(arrows)
.
4
.
On
passenger
side,
push
aside
wiring
harness
and
re-
move
two
screws
retaining
plenum
housing
.
See
Fig
.
3
.
Fig
.
3
.
Ríghtside
plenum
retaining
screws
(arrows)
.
VU1L535
5
.
On
driverside,
push
aside
wiring
harness
and
remove
screw
retaining
plenum
.
Pull
plenum
up
and
remove
from
engine
bay
.
See
Fig
.
4
.
6
.
Unclip
blower
motor
housing
cover,
disconnect
control
cable,
and
turn
center
retainer
1
/4
turn
to
remove
cover
.
See
Fig
.
5
.
7
.
Disconnect
electrical
connectors
from
blower
motor
.
8
.
Remove
left
upper
section
of
blower
housingby
detach-
ing
spring
clipsat
edge
of
housing
.
See
Fig
.
6
.
HEATER
AND
CONTROLS
Fig
.
4
.
Remove
screw
at
A
and
pull
air
plenumupward
.
0012534
0012636
Fig
.
5
.
Blower
motor
housing
clips
(A)
;
control
cable
(B)
;
and
center
retainer(C)
.
i
[u6,
Fig
.
6
.
Spring
clips
(arrows)
on
driver
sideof
blower
housing
.
640-16
HEATING
AND
AIR
CONDITIONING
A/C
expansion
valve,
removing
and
installing
Fig
.
45
.
Control
module
carrier
retaining
screws
(arrows)
.
1
.
Following
manufacturers
instructions,
connectanap-
proved
refrigerant
recovery/recycling/recharging
unit
to
A/C
system
and
discharge
system
.
WARNING
-
Do
not
discharge%harge
the
WC
system
without
properequipmentand
training
.
Damage
to
the
vehi-
cle
and
personal
injury
may
result
.
2
.
Remove
glove
compartment
and
glove
compartment
support
frame
.
See513
Interior
Trim
.
3
.
Remove
right
side
footwell
vents
.
4
.
Remove
right
side
control
module
carrier
screws
and
tilt
carrier
down
.
See
Fig
.
46
.
5
.
Remove
expansion
valve
cover
.
See
Fig
.
46
.
Fig
.
46
.
Four
screws
retain
expansion
valve
cover
(arrows)
.
AIR
CONDITIONING
0012666
0012663
6
.
Remove
A/C
refrigerant
line
fiange
bolt(s)
from
expan-
sion
valve
.
Plug
lines
immediately
.
See
Fig
.
47
.
NOTE
-
If
necessary,
remove
air
plenum
grille
fromrear
of
en-
gine
compartment
as
described
earlier
in
Blower
mo-
tor,
removing
and
installing
.
Remove
wiring
hamess
cover
screws
and
then
remove
right
side
plenum
screws
.
Reaching
finto
the
plenum
chamber,
remove
AIC
fine
flange
bolt
to
allow
expansion
valve
room
for
removal
.
Fig
.
47
.
Refrigerant
line
fiange
mounting
boltat
expansion
valve(arrow)
.
7
.
Remove
screws
from
top
of
expansion
valve
and
re-
move
expansion
valve
from
evaporator
.
See
Fig
.
48
.
Fig
.
48
.
Expansion
valve
mountingscrews
(A)
.
0011667
