Land Rover Defender Workshop Rover Manual

							HEATINGANDVENTILATION
3
REPAIR
Refit
6. Fitfoam rubber toheater matrixcasing.
7. Position matrixinheater unitcasing.
8. Check thatboth ventflaps operate correctly
without sticking.
9. Secure matrixtopretaining plate.
10. Secure matrixbottom retaining plates.
11. Fitheater unit
SeeHeater unit. RESISTOR
UNIT
Service repairno-80.20.17
Remove 1. Remove heaterunit
SeeHeater unit.
2.Drill out4rivets securing resistormounting plate
to top ofvolute housing.
3. Remove resistoranddisconnect blowermotor
plug from harness.
Refit 4. Apply Bostik adhesive toresistor mounting plate
and rivet tovolute housing.
5. Reconnect blowerharness motorplug.
6. Fitheater unit
SeeHeater unit.   
						

							80HEATING
ANDVENTILATION
4 REPAIR
HEATER
CONTROL CABLE-TEMPERATURE
CONTROL Service repairno-80.10.05
Remove 1. Disconnect battery.
2.Remove 4screws securing instrument panelto
fascia cowl.
3. Pull instrument panelawayfromfascia and
disconnect speedometer cabletogive easier
access tocontrol cableatbulkhead.
4. Remove retaining screwsandpulloffair
distribution andtemperature controlleverknobs.
5. Remove 3screws anddetach sidecover,
complete withcontrol leverassembly.
6. Remove 2screws securing controllever
assembly toside cover andremove cover.Note
plastic screwspacers fittedbetween coverand
control leverassembly andretain.
7. Remove smallboltand release outercable
retaining clip.
8. Slacken grubscrew andrelease innercable from
clevis.
9. From inside engine compartment, releaseouter
cable retaining clipatheater unit.
10. Slacken trunnion fixingandrelease innercable
from heater unitflaplever.
11. Release 2retaining clipssecuring controlcables
to engine bulkhead andheater hoses.
12. Pullcontrol cablethrough bulkhead grommet
and remove fromvehicle.
Refit
13. Fitnew control cabletoheater flaplever trunnion
with approximately 10mm ofinner cable
protruding fromtrunnion. Fullytighten trunnion.
14. Secure outercable withretaining clip.
15. Route control cablethrough sealinggrommet
and along inside ofengine bulkhead tofascia
panel.    
						

							HEATINGANDVENTILATION
5
REPAIR
16.
Secure controlcablestoengine bulkhead and
heater hoseswithretaining clips.
17. With control leverinclosed position, fitinner
cable tolever clevis andfully tighten clevisgrub
screw.
18. Fitouter cable retaining clipand fully tighten
securing bolt.
19. Fitside cover tocontrol leverassembly. Ensure
fixing screw spacers arepositioned between
cover andlever assembly.
20. Fitside cover tofascia.
21. Fitcontrol leverknobs.
22. Reconnect speedometer cableandfitinstrument
panel.
23. Reconnect battery.  
						

							80HEATING
ANDVENTILATION
6 REPAIR
HEATER
CONTROL CABLE-AIR DISTRIBUTION
Service repairno-80.10.12
Remove 1. Disconnect battery.
2. Remove steeringwheel
SeeSTEERING,
Repair, Steering wheel.
3.Remove steeringcolumnnacelleSee
STEERING, Repair,Steering columnnacelle.
4.Remove instrument panelSeeINSTRUMENTS,
Repair, Instrument panel.
5.Remove retaining screwsandpulloffair
distribution andtemperature controlleverknobs.
6. Remove 3screws anddetach sidecover,
complete withcontrol leverassembly.
7. Remove 2screws securing controllever
assembly toside cover andremove cover.Note
plastic screwspacers fittedbetween coverand
control leverassembly andretain.
8. Remove smallboltand release outercable
retaining clip.
9. Slacken grubscrew andrelease innercable from
clevis.
10. Remove lowerfascia panelassembly
See
CHASSIS ANDBODY, Repair, Lowerfascia
panel (heater duct)assembly.
11.Remove 19screws andliftoff heater ductcover.
12. Slacken ventflaptrunnion fixing,release air
distribution controlcableandremove from
heater duct.
13. Check condition offoam sealant onheater duct
cover andrenew ifnecessary.    
						

							HEATINGANDVENTILATION
7
REPAIR
Refit
14. Fitnew control cablethrough heaterductcover
and secure tovent flaptrunnion. Bendover
cable endtofully secure.
15. Fitheater ductcover.
16. Fitlower fascia panelassembly tofascia
bulkhead
See CHASSIS ANDBODY, Repair,
lower fascia panel(heater duct)assembly.
17.Route control cablealong fascia bulkhead to
contol leverassembly.
18. With control leverinclosed position, secure
cable toclevis.
19. Fitouter cable retaining cliptolever assembly.
20. Fitlever assembly toside cover. Ensure screw
spacers arefitted between coverandlever
assembly.
21. Fitside cover tofascia cowl.
22. Fitcontrol leverknobs.
23. Fitinstrument panel
SeeINSTRUMENTS,
Repair, Instrument panel.
24.Fitsteering columnnacelleSeeSTEERING,
Repair, Steering columnnacelle.
CONTROL CABLEANDBLOWER MOTORSWITCH
Service repairno-80.10.17 -Control cable
Service repairno-80.10.22 -Blower motorswitch
Remove 1. Disconnect battery.
2.From inside engine compartment, releaseouter
cable retaining clipatheater unit.
3. Slacken trunnion fixingandrelease innercable
from heater unitflaplever.
4. Release 2retaining clipssecuring controlcables
to engine bulkhead andheater hoses.
5.Remove 4screws securing instrument panelto
fascia cowl.
6. Pull instrument panelawayfromfascia and
disconnect speedometer cabletoease access to
control cable.
7. Remove 2screws securing controllever
assembly toside offascia panelcowl.Note
plastic screwspacers fittedbetween cowland
lever assembly andretain.    
						

							80HEATING
ANDVENTILATION
8 REPAIR
8.
Release leverassembly anddisconnect 3
blower motorleads, noting theirpositions.
9. Pull control cablethrough bulkhead grommet
and outfrom instrument panelcowl.
10. Release retaining clipsecuring outercable to
lever assembly.
11. Release innercable fromlever peg.
NOTE: Ifthe blower motorswitch isfaulty
the complete leverassembly willhave to
be renewed.
Refit 12. Fitnew control cabletolever assembly peg.
13. Fitretaining cliptosecure outercable.
14. Reconnect blowermotorleads.
15. Route cabletorear ofinstrument panelcowl,
along bulkhead andoutthrough grommet into
engine compartment.
16. Fitlever assembly topanel cowl.Ensure screw
spacers arefitted between cowlandlever
assembly.
17. Fitinstrument paneltofascia cowl.
18. With lever inclosed position, fitcontrol cableto
heater unitflaplever trunnion.
19. Secure outercable withretaining clip.
20. Secure controlcablestoengine bulkhead and
heater hoseswithretaining clips.
21. Reconnect battery.  
						

							AIRCONDITIONING
1
DESCRIPTION
ANDOPERATION
AIR
CONDITIONING SYSTEM
Description Air conditioning isan optional systemwhichprovides
fully integrated climatecontrolforthe vehicle interior.
The airconditioning systemcomprises fourmajor
units asfollows:- Anevaporator matrixandexpansion
valve (1),housed inthe heater/ coolerunit(3),an
engine mounted compressor (4),acondenser (5), mounted
infront ofthe radiator, andareceiver/drier
(7) located tothe right ofthe condenser.
Ancillary components inthe system comprise ablower
motor (2),also housed inthe heater/cooler unit,and
condenser coolingfanmotors (6),mounted ona
support frame.Thefourmajor unitsareinterconnectd
by preformed metalandflexible refrigerant pipesas
illustrated below(RHdrive installation shown).
Coolant flowtoaheater matrix, housed inthe heater
cooler unit,iscontrolled byawater valve(8)from a
combined airconditioning panelonthe vehicle fascia.
1.Evaporator matrixandexpansion valve
2. Blower motor
3. Heater/cooler unit
4. Compressor
5. Condenser 6.
Condenser fanmotors
7. Receiver/drier
8. Water valve
9. Heater matrixfeedandreturn hoses   
						

							82AIR
CONDITIONING
2 DESCRIPTION
ANDOPERATION
Operation Evaporator
unitandexpansion valve
High pressure liquidrefrigerant isdelivered tothe
expansion valvewhich isthe controlling deviceforthe
air conditioning system.Asevere pressure drop
occurs acrossthevalve andasthe refrigerant flows
through theevaporator itpicks upheat from the
ambient air,boils andvaporizes. Asthis change of
state occurs, alarge amount oflatent heatis
absorbed. Theevaporator istherefore cooledandas
a result heatisextracted fromtheairflowing across
the evaporator. Therefrigerant leavestheevaporator,
on itsway tothe compressor, asalow pressure gas.
An evaporator sensormeasures theairtemperature at
the evaporator andengages ordisengages the
compressor clutchtoprevent icingofthe airways.
CompressorThe compressor, apump specially designed toraise
the pressure ofthe refrigerant, ismounted onthe front
of the engine andisdriven byan independent drive
belt from thecrankshaft pulley.Thecompressor draws
vaporized refrigerant fromtheevaporator. Itis
compressed witharesulting riseintemperature and
passed ontothe condenser asahot, high pressure
vapour.CondenserThe condenser ismounted directlyinfront ofthe
radiator andconsists ofarefrigerant coilmounted ina
series ofthin cooling finstoprovide themaximum
heat transfer. Airflow across thecondenser isinduced
by vehicle movement andassisted bytwo electric fans
attached tothe frame ofthe condenser. The
refrigerant highpressure vapourentersthecondenser
inlet onthe RH side. Asthe vapour passes through
the condenser coilstheairflow, assisted bythe two
fans, carries thelatent heataway fromthecondenser.
This induces achange ofstate resulting inthe
refrigerant condensing intoahigh pressure warm
liquid. Fromthecondenser, therefrigerant continues
to the receiver/ drier.
Receiver/drierThis component actsasareservoir andisused to
hold extra refrigerant untilitis needed bythe
evaporator. Thedrier within thereceiver unitcontains
a filter anddessicant (dryingmaterial) whichabsorb
moisture andprevent dessicant dustfrom being
carried withtherefrigerant intothesystem. AIR
CONDITIONING ANDHEATER CONTROLS -
LH DRIVE
1. Temperature control
Move thelever upwards (RED)toincrease air
temperature, ordownwards (BLUE)toreduce air
temperature.2. Air conditioning switch
Press theswitch (indicator lampilluminates) to
activate theairconditioning. Pressagaintoswitch off.
3.Air recirculation control
Move thelever fullyupwards toactivate air
recirculation. Movethelever fullydownwards to
cancel recirculation.
NOTE: Prolonged recirculation maycause
the windows tomist up.
4. Air distribution control
Lever fullyup-air towindscreen vents(alsoprovides
some airtothe footwell).
Lever midway -air tofascia vents(alsoprovides some
air tothe footwell).
Lever fullydown -air tofootwell vents(alsoprovides
some airtothe windscreen).  
						

							AIRCONDITIONING
3
DESCRIPTION
ANDOPERATION
5.
Blower motorfanspeed control
Move thelever tothe right toprogressively increase
fan speed.
Location ofair vents -L H drive
AIR CONDITIONING ANDHEATER CONTROLS -
RH DRIVE
1. Temperature control
Move thelever tothe right (RED) toincrease air
temperature, ortothe left(BLUE) toreduce air
temperature. 2. Air conditioning indicatorlamp
Illuminates whentheairconditioning systemis
operating. 3.
Air conditioning switch
Press theRH portion ofthe switch toactivate theair
conditioning (indicatorlampilluminates). PresstheLH
portion toswitch off.
NOTE: Airconditioning shouldonlybe
activated whentheengine isrunning.
4. Blower motorfanspeed control
Move thelever upwards toprogressively increasefan
speed.    
						

							82AIR
CONDITIONING
4 DESCRIPTION
ANDOPERATION
5.
Air distribution control
Push LHbutton -air towindscreen vents(also
provides someairtothe footwell).
Push middle button-air tofascia vents(alsoprovides
some airtothe footwell).
Push RHbutton -air tofootwell vents(alsoprovides
some airtothe windscreen).
6. Air recirculation switch
Press theLHportion ofthe switch toactivate air
recirculation. PresstheRH portion forfresh air.
NOTE: Prolonged recirculation maycause
the windows tomist up.