Heater Core: Service and Repair

Fig. 22 Heater Core Replacement:

1. Disconnect battery ground cable.
2. Place temperature control lever in warm position, then drain cooling system and disconnect heater hoses.
3. Remove instrument panel, refer to Instrument Panel, Gauges and Warning Indicators/Instrument Panel/Service and Repair.
4. Remove heater and center ventilation ducts, then disconnect air selection, temperature control and mode selection wires.
5. Remove heater unit.
6. Remove water valve cover, joint hose clamp, joint hose, screws and piping clamp from heater unit, then the heater core from heater unit.

Fig. 19 Positioning Mode Selection Damper Lever:

Fig. 23 Positioning Water Valve Control Lever:

Fig. 24 Positioning Air Selection Damper Lever:

7. Reverse procedure to install, noting the following:
a. Place mode selector lever in defrost/vent position, then with mode selection damper lever pressed inward in direction indicated by arrow connect mode selection control wire to lever and secure outer cable using clip.
b. Place temperature control lever in "COOL" position, then with water valve control lever pressed inward in direction indicated by arrow connect temperature control wire to lever and secure outer cable using clip.
c. Place air selection lever in recirculation position, then with air selection damper lever pressed inward in direction indicated by arrow connect air selection control wire to lever and secure outer cable using clip.