1999 LAND ROVER DISCOVERY Workshop Manual

AIR CONDITIONING
82-36REPAIRS
Sensor - solar light
$% 82.20.92
Remove
1.Carefully remove solar light sensor from fascia.
2.Disconnect multiplug from solar light sensor.
3.Remove solar light sensor. Refit
1.Connect multiplug to solar light sensor.
2.Position solar light sensor to fascia and push to
secure.

AIR CONDITIONING
REPAIRS 82-37
Sensor - air temperature
$% 82.20.93
Remove
1.Release 2 quarter turn screws to release fascia
access panel.
2.Lower fascia access panel.
3.Disconnect multiplug from air temperature
sensor.
4.Remove 2 screws securing air temperature
sensor to fascia.
5.Remove air temperature sensor from fascia. Refit
1.Position air temperature sensor to fascia and
secure with screws.
2.Connect multiplug to air temperature
3.Position and secure fascia access panel with
quarter turn screws.

AIR CONDITIONING
82-38REPAIRS
Evaporator, evaporator thermistor and
thermal expansion valve (TXV)
$% 82.25.20
Remove
1.Remove heater assembly.

+ HEATING AND VENTILATION,
REPAIRS, Heater assembly - models with
air conditioning.
2.Remove bulkhead and evaporator pipe seals.
3.Disconnect multiplug from evaporator
thermistor. 4.Remove 2 screws securing temperature control
servos to evaporator casing.
5.Remove 2 screws securing coolant pipe
support bracket to casing.
6.Remove screws securing coolant pipe saddle
clamp to casing and remove saddle.
7.Remove heater matrix.
8.Remove 5 screws securing casings.

AIR CONDITIONING
REPAIRS 82-39
9.Remove 12 spring clips securing casings. 10.Remove evaporator casing and collect
insulation.
11.Remove evaporator assembly.
12.Remove evaporator thermistor.

AIR CONDITIONING
82-40REPAIRS
13.Remove covering from TX valve, release 2
clips securing TX valve to pipe.
14.Release 2 unions securing TX valve, remove
TX valve, remove and discard 'O' rings.
15.Release pipe union, remove pipe and discard
'O' ring. Refit
1.Using a new 'O' ring, position pipe to
evaporator and tighten union.
2.Using new 'O' rings, position TX valve. Connect
pressure pipe union and tighten to 22 Nm (16
lbf. ft). Connect evaporator pipe and tighten to
32 Nm (24 lbf.ft).
3.Position TX valve sensor to pipe and secure
with clips.
4.Fit sensor covering.
5.Fit evaporator thermistor.
6.Fit evaporator assembly.
7.Fit insulation to evaporator casing and fit
casing.
8.Secure spring clips.
9.Fit and tighten casing screws.
10.Fit heater matrix, ensuring matrix temperature
is correctly positioned.
11.Fit coolant pipe saddle, fit and tighten screws
securing saddle and pipe bracket.
12.Fit and tighten temperature servo screws.
13.Connect multiplug to evaporator thermistor.
14.Clean any bulk head seal from casing.
15.Fit bulkhead and evaporator pipe seals.
16.Fit heater assembly.

+ HEATING AND VENTILATION,
REPAIRS, Heater assembly - models with
air conditioning.

AIR CONDITIONING
REPAIRS 82-41
Expansion valve - (TXV) - rear
$% 82.26.01
Remove
1.Depressurise air conditioning system.

+ AIR CONDITIONING, REFRIGERANT
RECOVERY, RECYCLING AND
RECHARGING, Refrigerant recovery,
recycling and recharging.
2.Remove rear lower trim casing.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Trim casing - side - loadspace.
3.Remove 5 bolts securing seat support bracket
and remove bracket.
4.Release insulation from TXV pipe unions and
sensor.
5.Remove clip securing sensor to pipe and
release sensor. 6.Loosen TXV pipe unions, release pipes and
remove TXV.
7.Remove and discard 'O' rings.
Refit
1.Lubricate new 'O' rings with clean refrigerant oil
and fit to TXV pipes.
2.Position TXV, align pipes and tighten unions.
3.Connect sensor and secure with clip.
4.Fit insulation to TXV valve and sensor.
5.Position seat support bracket, fit bolts and
tighten to 24 Nm (18 lbf.ft)
6.Repressurise air conditioning system.

+ AIR CONDITIONING, REFRIGERANT
RECOVERY, RECYCLING AND
RECHARGING, Refrigerant recovery,
recycling and recharging.
7.Fit rear lower trim casing .

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Trim casing - side - loadspace.

AIR CONDITIONING
82-42REPAIRS
Evaporator - rear
$% 82.26.20
Remove
1.Remove evaporator assembly.

+ AIR CONDITIONING, REPAIRS,
Evaporator and motor assembly - rear.
2.Remove insulation from TXV.
3.Release relay from support bracket.
4.Remove ducting seal.
5.Remove 4 screws securing lower part of
casing, release and remove lower casing. 6.Remove 6 screws and 4 clips securing main
casing and remove top half of casing.
7.Loosen and release evaporator pipes unions,
release pipes and remove evaporator.
8.Remove and discard evaporator pipe 'O' rings.
Refit
1.Lubricate new 'O' rings with clean refrigerant oil
and fit to evaporator pipes
2.Position evaporator, connect pipes and tighten
unions.
3.Position main casing and secure with clips and
screws.
4.Position lower part of casing and secure with
screws.
5.Fit ducting seal
6.Secure relay to support bracket.
7.Fit insulation to TXV.
8.Fit evaporator assembly.

+ AIR CONDITIONING, REPAIRS,
Evaporator and motor assembly - rear.

AIR CONDITIONING
REPAIRS 82-43
Evaporator and motor assembly - rear
$% 82.26.21
Remove
1.Depressurise air conditioning system.

+ AIR CONDITIONING, REFRIGERANT
RECOVERY, RECYCLING AND
RECHARGING, Refrigerant recovery,
recycling and recharging.
2. V8 models: Remove 4 clips securing rear
exhaust heat shield and remove heat shield.
3.Remove 2 bolts securing high and low
pressure pipes, release pipes and discard 'O'
rings.
CAUTION: Always fit plugs to open
connections to prevent contamination.
4.Remove 2 bolts securing grommet flange to
body and remove flange.
5.Remove LH rear lower trim casing.

+ INTERIOR TRIM COMPONENTS,
REPAIRS, Trim casing - side - loadspace.6.Remove 5 bolts securing seat support bracket
and remove bracket.
7.Disconnect A/C harness multiplugs from body
harness.