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HEATING SYSTEM
Removing the heater unit
Drain off
th
e coo
lant and disconnect the negative
battery lead. Rem ove
the
hoses
to
th
e co ntro
i
va
lve.
Re move
the pane
l,
below
th
e
dashboard,
by loosening
the two fixing
sc
rews, one on the
left cow
l side
and
one beside the glove
compartment.
Pull,
the upper
section
of the panel rearwards
so
that
it loosen
s
from
the clips in the dashboard and free the panel from
the
bonnet release
controI. Remove
the mat on the
transmission tunnel.
Loosen
and remove the defros-
ter hoses
and controi wires and remove
the
switch
for the
fan and
disconnect the
cab les
to
the
fan
motor.
Remove the two
sc rews
which
hold
the fusebox to
the
heater.
Remove
the
contro
i
va lve and
loosen th
e
upper
hose
to the heater
unit.
Care
must be
taken
with
the controi valve
and
the
copper
tube
between
th
e
valve and the
heater.
Plug
th
e
outlets on the
heater
so that the remaining coo l/ant does
not
run
into the
ea
r on removal. Loosen the ground
cab les
from
the right-hand braeket.
Loosen and
remove the
four
screws
which
hold th
e
heater unit
to
the braekets
and
loosen
the draining
hose.
Lift
out the
heater
unit
and controi valve
carefu
lly.
Fig.
8-32.
Heater
unit, dismantled
l
.
Heat controi
valve
2.
Heater
casing
3.
Cell
system
4.
Fan casing
5.
Fan
6.
Spring clips
7.
Heater
casing
8. Rubber
bush
i
ng
9.
Sens itive
bod
y
for
heat
controi
valve
Fig.
8-33.
Removin
g spring clips
Dismantling the heater unit
VO LVO
103288
Remove the four
rubber
bushes on the
sid
es
of
the
heater unit. Mark the
fan cas
in
g
to
facil itate
reas
-
semb ly.
Remove the
sprin
g
clips whicb
hold the
heater,
Fig.
8-33 and
separate
the two
ha lves. This
exposes both the ce
ll
system with sensitive body for
controi valve and
the fan
motor.
Replacing the fan motor
Remove the
heater unit
and dismantie it as described
above.
Mark
the mounting plate in relation to the fan
casing.
Loosen
the mounting plate with fan motor
from the fan casing by straightening the tabs as
shown in Fig. 8-34.
Remove the screws which
hold
the fan motor to the
mounting
plate. Exchange the fan motor and replace
the screws which
hold it
to the mounting plate. Re-
place the mounting plate
on
the fan casing.
Reassemble the
heater
unit and mount it
in
the ve
-
hicle in
accordance with the following description.
Fig. 8-34.
Dismantling the mounting plate
VOLVO
103290
8
:
19
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