For 1990-2009 cars

### Removal Procedure

1. Drain the coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
2. Remove the instrument panel storage compartment. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages, and Console.
3. Disconnect the electrical connectors as necessary.
4. Remove the center floor air distribution duct.
5. Remove the hinge pillar trim panels. Refer to Body Hinge Pillar Trim Panel Replacement in Interior Trim.
6. Remove the blower motor cover.
7. Remove the blower motor. Refer to Blower Motor Replacement .
8. Roll back the instrument panel.
9. Remove the coolant recovery reservoir. Refer to Coolant Recovery Reservoir Replacement in Engine Cooling.
10. Remove the heater hoses. Refer to the following procedures:

• | Heater Inlet Hose Replacement

• | Heater Outlet Hose Replacement

11. While holding the HVAC module to the cowl, remove the screw on the interior side of the cowl, near the evaporator pipe, if equipped.
12. On the engine side of the cowl, remove the 4 screws that hold the HVAC module to the cowl.
13. On the engine side of the cowl, remove the 2 nuts that hold the HVAC module to the cowl.
14. Remove the HVAC module.

### Installation Procedure

1. Install the HVAC module.
2. On the engine side of the cowl, install the nuts that hold the HVAC module to the cowl.
3. On the engine side of the cowl, install the 4 screws that hold the HVAC module to the cowl.
4. On the interior side of the cowl, install the screw.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Tighten the following fasteners:

Tighten

• | Tighten the screws on the engine side of the cowl to 1.9 N·m (17 lb in).

• | Tighten the two nuts to 2.8 N·m (25 lb in).

• | Tighten the screw on the interior side of the cowl to 11 N·m (97 lb in).

6. Install the heater hoses. Refer to the following procedures:

• | Heater Inlet Hose Replacement

• | Heater Outlet Hose Replacement

7. Install the coolant recovery reservoir. Refer to Coolant Recovery Reservoir Replacement in Engine Cooling.
8. Roll forward the instrument panel.
9. Install the blower motor. Refer to Blower Motor Replacement .
10. Install the blower motor cover.
11. Install the hinge pillar trim panels. Refer to Body Hinge Pillar Trim Panel Replacement in Interior Trim.
12. Install the center floor air distribution duct.
13. Connect the electrical connectors as necessary.
14. Install the instrument panel storage compartment. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gages, and Console.
15. Add the engine coolant. Refer to Cooling System Draining and Filling in Engine Cooling.
16. Inspect the system for leaks.