Auxiliary Climate Control: Other Ford Expedition II

Blower Motor

The auxiliary air conditioning system contains a blower motor which is controlled by the heater blower motor switch on the front or rear auxiliary A/C control.

Heater Core

The heater core consists of fins and tubes arranged to extract heat from the engine coolant and transfer the heat to air passing through the auxiliary climate control housing.

Evaporator Core

Note. If an evaporator core leak is suspected, the evaporator core must be vacuum leak tested before it is removed from the vehicle. For additional information, refer to CLIMATE CONTROL SYSTEM-GENERAL INFORMATION .

Note. Installation of a new receiver/drier is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the receiver/drier.

The evaporator core is an aluminum plate/fin type and is located in the auxiliary climate control housing. A mixture of refrigerant and oil enters the bottom of the evaporator core through the evaporator core inlet tube and then moves out of the evaporator core through the evaporator core outlet tube. When the A/C compressor is operating, air from the blower motor is cooled and dehumidified as it flows through the evaporator core fins.

Thermostatic Expansion Valve

The thermostatic expansion valve (TXV) restricts the flow of refrigerant from the high pressure side of the refrigerant system and separates the low pressure and high pressure sides of the auxiliary refrigerant system. Refrigerant entering and exiting the auxiliary evaporator core passes through the TXV through two separate flow paths. An internal temperature sensing bulb senses the temperature of the refrigerant flowing out of the evaporator core and adjusts an internal pin-type valve to meter the refrigerant flow into the evaporator core. The internal pin-type valve decreases the amount of refrigerant entering the evaporator core at lower temperatures, and increases the amount of refrigerant entering the evaporator core at higher temperatures.

Auxiliary A/C-Heater Lines

The auxiliary lines are secured to the underbody of the vehicle. Each auxiliary line is only available as a multiple-piece kit for ease of installation.

Air Conditioning

Refer to CLIMATE CONTROL SYSTEM-GENERAL INFORMATION article.

Material

MATERIAL SPECIFICATION

Scheme 93

Scheme 94

Scheme 95

Scheme 96

Scheme 97

Scheme 98

Scheme 99

1. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-209921) .
2. Remove the RH quarter trim panel. For additional information, refer to «INTERIOR TRIM AND ORNAMENTATION»(ref-209953) .
3. Detach the upper air duct from the auxiliary housing.
4. Remove the bolts and the auxiliary line bracket.
5. Disconnect the heater hoses. Using suitable tools, clamp off the heater hoses. Disconnect the heater hoses.
6. Disconnect the drain hose.
7. Disconnect the blower motor and blower motor resistor electrical connectors.
8. Disconnect the electrical actuator electrical connectors.
9. Remove the bolt.
10. Remove the bolt and the auxiliary climate control housing.
11. To install, reverse the removal procedure. Install new O-ring seals with the correct amount of clean PAG oil. Clean and lubricate the coolant hoses with plain water only if needed. Lubricate the refrigerant system with the correct amount of clean PAG oil. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-209921) .
12. Fill the engine coolant level. For additional information, refer to «ENGINE COOLING»(ref-209901) .
13. Evacuate, leak test and charge the refrigerant system. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-209921) .

Scheme 100

Scheme 101

1. Remove the RH quarter trim panel. For additional information, refer to «INTERIOR TRIM AND ORNAMENTATION»(ref-209953) .
2. Remove the blower motor. Disconnect the blower motor electrical connector. Remove the screws. Remove the blower motor.
3. Remove the wheel from the blower motor. Remove the push clip. Remove the wheel.
4. To install, reverse the removal procedure.

MATERIAL SPECIFICATION

MATERIAL SPECIFICATION

MATERIAL SPECIFICATION

MATERIAL SPECIFICATION

Scheme 102

1. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-209921) .
2. Remove the RH quarter trim panel. For additional information, refer to «INTERIOR TRIM AND ORNAMENTATION»(ref-209953) .
3. Disconnect the fittings and remove the thermostatic expansion valve. Discard the O-ring seals.
4. To install, reverse the removal procedure. Install new O-ring seals lubricated in clean PAG oil. Lubricate the refrigerant system with the correct amount of clean PAG oil. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-209921) .
5. Evacuate, leak test and charge the refrigerant system. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-209921) .

Scheme 103

Scheme 104

Scheme 105

1. Remove the RH quarter trim panel cup holder and access panel.
2. Remove the screws.
3. Disconnect the blend door actuator electrical connector.
4. To install, reverse the removal procedure.

Scheme 106

Scheme 107

1. Remove the RH quarter trim panel access panel.
2. Remove the blower motor resistor. Disconnect the blower motor resistor electrical connector. Remove the screws and the blower motor resistor.
3. To install, reverse the removal procedure.

Scheme 108

1. Remove the RH quarter trim panel. For additional information, refer to «STEERING COLUMN SWITCHES»(ref-209897) .
2. Remove the auxiliary temperature blend door actuator. Disconnect the temperature blend door actuator electrical connector. Remove the screws. Remove the auxiliary temperature blend door actuator.
3. To install, reverse the removal procedure.