Ford F150 Pickup. Manual — part 1707

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Install new O-ring seals lubricated in clean PAG oil.

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Lubricate the refrigerant system with the correct amount of clean PAG oil. Refer to CLIMATE
CONTROL SYSTEM .

9. Evacuate, leak test and charge the refrigerant system. Refer to CLIMATE CONTROL SYSTEM .

2003 Ford Pickup F150

2003 HVAC Air Conditioning - F150 Pickup

2003 HVAC

Heating And Ventilation - F150 Pickup

SPECIFICATIONS

GENERAL SPECIFICATIONS

GENERAL SPECIFICATION

DESCRIPTION AND OPERATION

HEATING AND VENTILATION

The heating and defrosting system has the following features:

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Controls the temperature and, during A/C operation (if equipped), reduces the relative humidity of the air
inside the vehicle.

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Delivers heated or cooled air to maintain the vehicle interior temperature and comfort level.

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Controls the blower motor speed.

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Cooling or heating can be adjusted to maintain the desired temperature.

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System uses a reheat method to provide conditioned air to the passenger compartment.

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The blower motor (19805) draws outside air or recirculated air through the air inlet duct depending on the
function selected.

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All airflow from the blower motor passes through the A/C evaporator core (19860), if equipped.

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The temperature is then regulated by reheating a portion of the air and blending it with the remaining cool
air to the desired temperature.

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The temperature blending is varied by the temperature blend 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 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

Item

Specification

Lubricants
MERPOL(R)

ESE-M99B144-

B

PAG Refrigerant Compressor Oil (R-134a System) F7AZ-19589-DA (Motorcraft YN-
12-C)

WSH-M1C231-

B

2003 Ford Pickup F150

2003 HVAC Heating And Ventilation - F150 Pickup

2003 Ford Pickup F150

2003 HVAC Heating And Ventilation - F150 Pickup

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. The A/C blower motor has four speeds and is controlled by the blower motor switch and
resistor (manual systems) or the EATC module and blower speed controller (EATC systems).

DIAGNOSIS AND TESTING

HEATING/DEFROSTING

Refer to CLIMATE CONTROL SYSTEM .

REMOVAL AND INSTALLATION

BLOWER MOTOR

Removal and Installation

All vehicles

1. Remove the RH lower instrument panel insulator.

Fig. 1: View Of Removing RH Lower Instrument Panel Insulator
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 HVAC Heating And Ventilation - F150 Pickup

2. If equipped, remove the dealer installed air filter and brackets.

3. Remove the passenger side scuff plate.

Fig. 2: Identifying Passenger Side Scuff Plate
Courtesy of FORD MOTOR CO.

4. Remove the passenger side kick panel.

1. Position aside the weatherstrip.

2. Remove the passenger side kick panel.

2003 Ford Pickup F150

2003 HVAC Heating And Ventilation - F150 Pickup