300Tdi Defender Air Conditioning Heater/Cooler Unit RH Drive
AIR CONDITIONING
13
REPAIR
HEATER/COOLER UNIT - RH DRIVE
Service repair no - 82.25.21
Remove
1. Disconnect battery.
2. Recover refrigerant from air conditioning system
See Refrigerant recovery, recycling,
recharging.
3. Release ties, remove insulation cover and
disconnect evaporator low pressure pipe.
4. Disconnect evaporator high pressure pipe.
5. Discard all pipe connection ’O’ rings. Cap or plug
all connections to prevent ingress of dirt and
moisture.
6. Using suitable pipe clamps, clamp heater matrix
feed and return pipes at heater/cooler unit.
7. Remove screw securing air control flap solenoid.
8. Disconnect 2 leads from thermostat.
9. Remove pipe from water valve vacuum switch.
10. Remove retaining clip and disconnect control
cable from evaporator flap operating rod.
11. Remove screw and release outer cable retaining
bracket.
12. Disconnect blower motor wiring plugs and
release harness retaining clip from housing.
13. Remove bolt securing front support bracket to
blower motor housing. If necessary, remove
blower motor resistor block to facilitate
operation.
14. From inside vehicle remove front passenger
carpet, if fitted.
15. Remove fixing screws and fold back footwell
insulation.
16. Remove 4 bolts securing heater/cooler unit lower
mounting bracket to bulkhead. Ensure spacing
washers from two innermost bolts are retrieved
from engine bulkhead side.
17. From inside engine compartment remove 2 bolts
securing top heater/cooler unit mounting bracket
to engine bullkhead.
18. Lift heater/cooler unit clear of air duct seal and
remove from vehicle.