FORD MUSTANG 2003 Workshop Manual

8. Remove the screw.
9. Remove the screws and remove the plenum chamber.
Installation 1. To install, reverse the removal procedure. Klj . 2 ba
32003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Door —
Air Inlet Duct
Removal 1. Remove the evaporator core housing. For additional information, refer to Section 412 - 02 .
2. Disconnect the vacuum line.
3. Remove the screws and remove the duct.
Installation 1. To install, reverse the removal procedure.
SECTION 412-
01: Air Distribution and Filtering 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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SPECIFICATIONS
SECTION 412-
02: Heating and Ventilation 2003 Mustang Workshop Manual General Specifications
Item Specification
Lubricant
MERPOL® ESE-
M99B144-
B PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-
DA (Motorcraft
YN- 12-C) WSH-
M1C231- B
Torque Specifications Description Nm lb-
in Interior evaporator core housing bracket nut and bolts 8 71 Klj . 1 ba
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DESCRIPTION AND OPERATION
Heating and Defrosting
The heating and defrosting system has the following features:
zControls the temperature and, during A/C operation, reduces the relative humidity of the air
inside the vehicle.
z Delivers heated or cooled air to maintain the vehicle interior temperature and comfort level.
z Controls the A/C blower motor speed.
z Cooling or heating can be adjusted to maintain the desired temperature.
z System uses a reheat method to provide conditioned air to the passenger compartment.
z The blower motor (19805) draws outside air through the air inlet duct from just below the
windshield during all system operations except for MAX A/C cooling (when recirculated air is
used).
z All airflow from the blower motor passes through the A/C evaporator core (19860).
z The temperature is then regulated by reheating a portion of the air and blending it with the
remaining cool air to the desired temperature.
z The temperature blending is varied by the air temperature control door, which regulates the
amount of air that flows through and around the heater core (18476), where it is then mixed and
distributed.
Heater Core
The heater core (18476) consists of fins and tubes arranged to extract heat from the engine coolant
and transfer it to air passing through the heater core. Blower Motor SECTION 412-
02: Heating and Ventilation 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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The A/C blower motor (19805 ) pulls air from the air inlet and forces it into the plenum assembly where
it is mixed and distributed.
Heater Hoses
NOTE:
The heater water hoses connect to the heater core using quick disconnect couplers. The
couplers are an integral part of the hose assemblies and cannot be separately serviced.
The heater water hoses (18472) provide a flexible connection between the engine and cooling system
allowing hot water to travel from the engine to the heater core. Klj . 2 ba
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DIAGNOSIS AND TESTING
Heating and Defrosting
Refer to
Section 412 - 00 .
SECTION 412-
02: Heating and Ventilation 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Blower Motor
Removal
1. Disconnect the jumper wire.
2. Disconnect the main harness.
3. Remove the screws. 4. Separate the cover from the motor. SECTION 412-
02: Heating and Ventilation 2003 Mustang Workshop Manual Klj . 1 ba
32003 Mustang Workshop Manual
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5. Separate the motor from the housing.
6. Disconnect the jumper from the motor.
zRemove the blower motor.
Installation 1. To install, reverse the removal procedure. Klj . 2 ba
32003 Mustang Workshop Manual
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