Heater Core Case: Service and Repair

Heater Unit

REMOVE
1. Disconnect the battery negative lead.
2. Drain the cooling system.
3. Disconnect the water inlet hose from the heater.
4. Disconnect the water outlet hose from the heater.
5. Working inside the vehicle withdraw the lower dash and remove the screws securing the lower edge of the center console.

Louvre Panel:

6. Remove the six screws securing the lower edge of the louvre panel to the console and evaporator case.
7. Remove the heater control panel and knobs from the center console.
8. Remove the center console.
9. Carefully pry out the four air vents.
10. Remove the screws securing the evaporator plenum and louvre panel to the dash top panel.
11. Withdraw the thermostat sensor from the fins of the evaporator, and pull the sensor pipe clear of the evaporator assembly.
12. Disconnect the electrical connectors at the rear of exterior driving mirror control switches and clock, and withdraw panel clear of the dash.

Mounting Screws:

13. Remove the screws securing the lower right mounting bracket.
14. Support the evaporator case and remove the two nuts securing the case and reinforcing strip to the upper mounting bracket.
15. Remove the cover bracket and carefully lower the evaporator assembly to the floor of the vehicle

Heater Ducts:

16. Disconnect the six hoses from the heater unit.
17. Disconnect the electrical leads from the heater unit at the multiplug.
18. Remove the four heater mounting bolts.
19. Remove the heater unit.

REFIT
1. Check that the seal for the fresh air intake is in place on the back of the heater unit.
2. Check that the seal for the heater core is in place on the hoses.
3. Reverse 1 to 19, ensuring that all openings are adequately sealed against the ingress of dust and moisture.