AC system FORD MUSTANG 2003 Workshop Manual

REMOVAL AND INSTALLATION
Compressor Manifold and Tube Assembly —
4.6L
Removal and Installation
NOTE: Installation of a new suction 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 suction accumulator.
1. Recover the refrigerant. For additional information, refer to Section 412 - 00 .
2. Disconnect the suction line spring lock coupling. zDiscard the O- ring seals.
3. Remove the A/C muffler bracket nut.
4. Disconnect the spring lock coupling. zDiscard the O- ring seals.
SECTION 412-
03: Air Conditioning 2003 Mustang Workshop Manual Material
Item Specification
PAG Refrigerant Compressor
Oil (R-
134a Systems)
F7AZ- 19589- DA (Motorcraft YN-
12- C) WSH-
M1C231-
B Klj . 1 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

5. Raise the vehicle. For additional information, refer to
Section 100 - 02 .
6. Remove the bolt and the compressor manifold assembly. zDiscard the O- ring seals.
7. To install, reverse the removal procedure. zInstall new O- ring seals lubricated in clean PAG oil.
z Lubricate the refrigerant system with the correct amount of clean PAG oil. For additional
information, refer to Section 412 - 00 .
8. Evacuate, leak test and charge the refrigerant system. For additional information, refer to Section 412 - 00 . Klj . 2 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

REMOVAL AND INSTALLATION
Suction Accumulator to Compressor Line —
4.6L
Removal and Installation
NOTE: Installation of a new suction 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 suction accumulator.
1. Recover the refrigerant. For additional information, refer to Section 412 - 00 .
2. Remove the air cleaner outlet tube. For additional information, refer to Section 303 - 12 .
3. Disconnect the spring lock coupling at the suction accumulator. zDiscard the O- ring seals.
4. Disconnect the spring lock coupling at the compressor manifold. zDiscard the O- ring seals. 5. Remove the suction accumulator to compressor line. SECTION 412-
03: Air Conditioning 2003 Mustang Workshop Manual Material
Item Specification
PAG Refrigerant Compressor
Oil (R-
134a Systems)
F7AZ- 19589- DA (Motorcraft YN-
12- C) WSH-
M1C231-
B Klj . 1 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

6. To install, reverse the removal procedure.
zInstall new O- ring seals lubricated in clean PAG oil.
z Lubricate the refrigerant system with the correct amount of clean PAG oil. For additional
information, refer to Section 412 - 00 .
7. Evacuate, leak test and charge the refrigerant system. For additional information, refer to Section 412 - 00 . Klj . 2 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

REMOVAL AND INSTALLATION
Compressor to Condenser Discharge Line —
4.6L
Removal and Installation
NOTE: Installation of a new suction 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 suction accumulator.
1. Recover the refrigerant. For additional information, refer to Section 412 - 00 .
2. Disconnect the dual- function pressure switch electrical connector and remove the switch.
3. Remove the A/C muffler bracket nut.
4. Disconnect the fitting at the condenser. zDiscard the O- ring seal.
SECTION 412-
03: Air Conditioning 2003 Mustang Workshop Manual Material
Item Specification
PAG Refrigerant Compressor
Oil (R-
134a Systems)
F7AZ- 19589- DA (Motorcraft YN-
12- C) WSH-
M1C231-
B Klj . 1 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

5. Disconnect the spring lock coupling at the compressor manifold and tube.
zDiscard the O- ring seals.
6. Remove the compressor to condenser discharge line.
7. To install, reverse the removal procedure. zInstall new O- ring seals lubricated in clean PAG oil. For additional information, refer to
Section 412 - 00 .
z Lubricate the refrigerant system with the correct amount of clean PAG oil. For additional
information, refer to Section 412 - 00 .
8. Evacuate, leak test and charge the refrigerant system. For additional information, refer to Section 412 - 00 . Klj . 2 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

REMOVAL AND INSTALLATION
Condenser to Evaporator Line
Removal and Installation
NOTE:
Installation of a new suction 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 suction accumulator.
1. Recover the refrigerant. For additional information, refer to Section 412 - 00 .
2. Remove the air cleaner outlet tube. For additional information, refer to Section 303 - 12 .
3. Raise the vehicle. For additional information, refer to Section 100 - 02 .
4. Remove the line bracket pin- type retainer.
5. Lower the vehicle.
6. Remove the nut and disconnect the fitting at the condenser. zDiscard the O- ring seal.
SECTION 412-
03: Air Conditioning 2003 Mustang Workshop Manual Material
Item Specification
PAG Refrigerant Compressor
Oil (R-
134a Systems)
F7AZ- 19589- DA (Motorcraft YN-
12- C) WSH-
M1C231-
B Klj . 1 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

7. Disconnect the spring lock coupling at the evaporator core.
zDiscard the O- ring seals.
8. Remove the condenser to evaporator line.
9. To install, reverse the removal procedure. zInstall new O- ring seals lubricated in clean PAG oil.
z Lubricate the refrigerant system with the correct amount of clean PAG oil. For additional
information, refer to Section 412 - 00 .
10. Evacuate, leak test and charge the refrigerant system. For additional information, refer to Section 412 - 00 . Klj . 2 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

DESCRIPTION AND OPERATION
Control Components
Manual A/C
The climate control system heats or cools the vehicle interior depending on the function selector
position and the temperature selected. Function selector position determines heating or cooling and air
distribution. The temperature blend control setting determines air temperature.
The manual climate control components are used to:
zselect air inlet source (outside or recirculated).
z select blower motor speed.
z select discharge air temperature (temperature blend).
z select discharge air location (defrost, panel, floor).
z select A/C compressor clutch operation. Component Locations SECTION 412-
04: Control Components 2003 Mustang Workshop Manual Klj . 1 ba
42003 Mustang Workshop Manual
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Control System Inputs
Climate Control Assembly
The climate control assembly has three system controls:
zThe blower motor switch controls blower motor speed by adding or bypassing resistors in the
heater blower motor resistor.
z The temperature selection is accomplished with a manually- controlled blend door actuator that
controls positioning of the temperature blend door. Movement of the control knob (18519) from Item Part
Number Description
1 18A318 Vacuum control motor (panel/defrost door)
2 19988 Temperature blend door actuator cable
3 18A318 Vacuum control motor (air inlet door)
4 A/C vacuum reservoir tank and bracket (part of
18454)
5 18A318 Vacuum control motor (floor/panel door) Klj . 2 ba
42003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...