Housing Assembly HVAC: Service and Repair

WARNING: IF EQUIPPED WITH A/C, THE REFRIGERATION SYSTEM MUST BE COMPLETELY EMPTY BEFORE PROCEEDING WITH THIS OPERATION.

1. Disconnect battery NEGATIVE cable.

2. Drain radiator and disconnect heater hoses at unit. Tape heater tubes to keep from leaking during removal.

3. Remove A/C condensate drain and disconnect vacuum lines.

4. Inside passenger compartment, perform as follows:

a. Remove right upper and lower under-panel silencers.

b. Remove steering column cover.

c. Remove left under-panel silencer.

5. Position front seat or right front seat full rear.

a. Remove right cowl side trim.

6. Remove glove box.

a. Remove right instrument panel reinforcement.

7. Remove ash receiver.

8. Remove center distribution and defroster adapter ducts.

9. Disconnect relay module.

10. Disconnect blower motor wire connector.

11. Disconnect demister hoses from top of unit.

12. For Non-ATC equipped vehicles, disconnect the temperature control cable flag from the bottom of the heater-A/C unit. Then un-clip the cable from the left side of the heat distribution duct. Swing the cable out of the way to the left. Disconnect the vacuum lines at the unit.

13. For ATC equipped vehicles, disconnect the instrument panel wiring from the rear face of the ATC control unit.

14. Disconnect right 25-way connector bracket and fuse block from panel.

15. From engine compartment, remove four unit attaching nuts.

16. Remove unit hanger strap lower screw, and rotate strap.

17. Move heater-A/C unit rearward to clear mounting studs, and lower unit.

18. While pulling the lower right of instrument panel rearward:

a. Rotate unit while pulling from under instrument panel.

To install, reverse the preceding operation.