Heater Core Case: Service and Repair

HEATER CORE AND EVAPORATOR CORE HOUSING, ASSEMBLY AND COMPONENTS

REMOVAL

CAUTION: Refrigerant Compressor Oil (mineral oil) F73Z-19577-AA (Motorcraft YN-9-A) should be used to lubricate R-134a refrigerant system O-ring seals only and should not be added to the R-134a refrigerant system as an A/C compressor lubricant. PAG Refrigerant Compressor Oil F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B only should be used as an A/C compressor lubricant.

NOTE:
- If an evaporator core leak is suspected, the evaporator core must be vacuum leak tested before it is removed from the vehicle.
- Installation of a new accumulator is not required when repairing the air conditioning system except when there is physical evidence of contamination from a failed A/C compressor or damage to the accumulator.
- New O-ring seals, lubricated in clean mineral oil, must be installed before reconnecting any A/C fitting which has been disconnected.
- Lubricate the coolant hoses with plain water only if needed.

1. Recover the refrigerant.
2. Remove the instrument panel. Refer to: Body and Frame, Interior Trim, Dashboard/Instrument Panel, Service and Repair, Removal and Installation, Service and Repair

3. Drain the engine coolant.
4. Remove the engine appearance cover.












5. Remove the parts in the order indicated in the illustrations and tables.

Item 6: Clamp Removal Note







1. Detach the wiring harness bracket and position the harness aside.







2. Remove the heater tube bracket nut.







3. Compress the clamps and disconnect the heater hoses.

Item 8: Fitting Removal Note







1. Remove the A/C line bracket nut at the inner fender well.







2. Remove the A/C line bracket nut at the dash panel.
3. Disconnect the evaporator outlet line fitting.

Item 11: Vacuum Connector Removal Note







1. Disconnect the vacuum line connectors in the engine compartment.






2. Detach the grommet and push the vacuum lines into the passenger compartment.

INSTALLATION
1. To install, reverse the removal procedure.
2. Lubricate the refrigerant system with the correct amount of clean PAG oil.
3. Fill and bleed the engine cooling system.
4. Evacuate, leak test and charge the refrigerant system.