Heater Core Case: Service and Repair

Heater and Cooler Unit

WARNING: All work involving the service and maintenance of air conditioning requires special equipment, knowledge, experience and a full awareness and adherence to safety precautions.

Remove
1. Disconnect battery negative lead.
2. Drain engine coolant.
3. Recover refrigerant from air conditioning system. Service and Repair
4. Remove fascia panel assembly.

Hoses & Pipes:

5. Release clips and disconnect coolant hoses from heater pipes.

Hoses & Pipes:

6. Remove securing bolt and disconnect low pressure pipe from evaporator.

WARNING: Wear eye and hand protection when disconnecting components containing refrigerant. Plug all exposed connections immediately.

7. Release 'P' clip retaining high and low pressure pipes.
8. Remove securing bolt and disconnect high pressure pipe from evaporator.
9. Discard 'O' ring seals.

Heater/cooler Unit:

10. Disconnect multiplug connecting heater to blower unit, remove 3 screws and remove blower unit.
11. Remove 5 screws securing casing to bulkhead and tunnel.
12. Remove 2 securing bolts and remove centre console front mounting bracket.
13. Disconnect 2 drain tubes..
14. Ease heater and cooler unit from its location and remove from vehicle.

Refit
15. Ease heater and cooler unit into position.
16. Fit retaining bolts finger tight. Tighten in sequence, centre and top bolts and then the bottom bolt.
17. Reverse removal procedure.
18. Use new 'O' rings and lubricate with refrigerant oil.
19. Evacuate and recharge system. Service and Repair
20. Leak test any disturbed joints.
21. Perform a functional check.