HVAC Housing - Installation

HVAC HOUSING ASSEMBLY

CAUTION: Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system Refrigerant Oil Level. Failure to properly adjust the refrigerant oil level will prevent the A/C system from operating as designed and can cause serious A/C compressor damage.

NOTE: When replacing multiple A/C system components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system Refrigerant Oil Level.

NOTE: If the A/C evaporator is being replaced, add 60 milliliters (2 fluid ounces) of refrigerant oil to the refrigerant system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.

NOTE: Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.





1. If removed, install the fresh air inlet (2) onto the dash panel (1).
2. Position the HVAC housing assembly (4) into the passenger compartment with the mounting studs and the condensate drain tube in their proper locations in the dash panel.
3. Install the two nuts (3 and 7) that secure the HVAC housing to the passenger compartment side of the dash panel. Tighten the nuts to 6.8 Nm (60 in. lbs.).
4. Install the bolt (5) that secures the HVAC housing to the floor bracket (6). Tighten the bolt to 6.8 Nm (60 in. lbs.).
5. Install the instrument panel assembly Instrument Panel - Installation .
6. On Mega Cab models, install the floor console duct Installation .




7. Install the two nuts (3) that secure the HVAC housing (1) to the engine compartment side of the dash panel (2). Tighten the nuts to 6.8 Nm (60 in. lbs.).
8. Install the powertrain control module (PCM) Powertrain Control Module - Installation .
9. Connect the heater hoses to the heater core tubes.
10. Connect the A/C liquid line and the A/C accumulator to the A/C evaporator A/C Line - Installation and Installation .
11. Reconnect the negative battery cable.
12. If the heater core is being replaced, flush the cooling system Service and Repair .
13. Refill the engine cooling system Service and Repair .
14. Evacuate the refrigerant system Refrigerant System Evacuate .
15. If the A/C evaporator is being replaced, add 60 milliliters (2 fluid ounces) of refrigerant oil to the refrigerant system. When replacing multiple A/C system components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system Refrigerant Oil Level . Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
16. Charge the refrigerant system Refrigerant System Charge .