Air Conditioning: Other Ford Thunderbird XI

A/C Compressor Pressure Relief Valve

An A/C compressor pressure relief valve is incorporated into the compressor A/C manifold and tube to

1. relieve unusually high refrigerant system discharge pressure buildups. For specifications regarding operating pressure(s), refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
2. prevent damage to the A/C compressor and other system components.
3. avoid total refrigerant loss by closing after the excessive pressure has been relieved.

Scheme 202

The A/C condenser core has the following characteristics

1. It is an aluminum fin and tube design heat exchanger located in front of the vehicle radiator (8005).
2. It cools compressed refrigerant gas by allowing air to pass over fins and tubes to extract heat and by condensing gas to liquid refrigerant as it is cooled.

Refrigerant Lines

The manifold and tube assembly-receiver drier carries the high-pressure liquid from the condenser core to the receiver drier, and from the receiver drier to the manifold and tube assembly-thermostatic expansion valve. It attaches to the A/C receiver drier, uses O-ring seals, and also contains the high-pressure service port.

The manifold and tube assembly-thermostatic expansion valve carries high-pressure liquid to the thermostatic expansion valve and low-pressure gas from the thermostatic expansion valve to the manifold and tube assembly-A/C compressor.

The manifold and tube assembly-A/C compressor carries the high-pressure gas from the A/C compressor to the condenser core. It also carries the low-pressure gas received from the manifold and tube assembly thermostatic expansion valve to the A/C compressor. The A/C manifold and tube assembly is attached to the A/C compressor, uses O-ring seals, and has

1. a Schrader-type valve stem core fitting used to mount the A/C pressure transducer so that the A/C pressure transducer can be removed without discharging the A/C system.
2. a serviceable high-pressure relief valve.

A/C Evaporator Core

The A/C evaporator core is the plate/fin type with a unique refrigerant flow path.

1. A mixture of refrigerant and oil exits the thermostatic expansion valve (TXV) and enters the evaporator tank area through the 1/2 inch (12.7 mm) tube.
2. The tank area is divided into three sections: front inlet, front outlet and rear tank.
3. The refrigerant enters the evaporator core tank area at the front inlet, flows down through the core and up the back side in a "U-flow" pattern.
4. The refrigerant moves into the rear tank area and across to the other half of the core. The refrigerant moves down through the core and back up the front side of the core to the front outlet tank area.
5. The refrigerant at this point is in a gaseous state. It exits the evaporator through the 5/8 inch (15.9 mm) tube then passes through the TXV.

Scheme 203

The thermostatic expansion valve has the following characteristics

1. It is mounted on the A/C evaporator core inlet and outlet tubes.
2. It is a block-type valve.
3. It contains an internal sensing bulb to increase the effectiveness of temperature sensing.
4. It is not serviceable. A new thermostatic expansion valve must be installed as a unit.

Receiver Drier

The receiver drier is mounted to the engine fan shroud to the right of the vehicle center. The inlet tube of the receiver drier attaches directly to the A/C condenser core and the outlet tube of the receiver drier attaches to the thermostatic expansion valve inlet line.

The receiver drier stores high-pressure liquid after it leaves the condenser core. A desiccant bag mounted in the receiver drier removes any retained moisture.

The manifold and tube assembly that mounts to the top of the receiver drier contains the high-pressure service port for the refrigerant system.

A/C Pressure Transducer

The A/C pressure transducer monitors the compressor discharge pressure and communicates with the powertrain control module (PCM). The PCM will interrupt A/C compressor operation in the event that the A/C pressure transducer indicates high system discharge pressures. It is also used to sense no or low charge conditions. If the pressure is below a predetermined value for a given ambient temperature, the PCM will not allow the clutch to engage.

1. The A/C pressure transducer is mounted on a Schrader valve-type fitting on the A/C compressor to condenser discharge line.
2. A valve depressor, located inside the threaded end of the A/C pressure transducer, presses on the Schrader valve stem and allows the A/C pressure transducer to monitor the compressor discharge pressure.
3. When the compressor discharge pressure rises, the PCM will interrupt the A/C compressor clutch coil circuit and disengage the A/C compressor. When the pressure drops, the PCM will enable the A/C compressor circuit. For specifications regarding operating pressure(s), refer to «AIR CONDITIONING PRESSURE SENSOR»(ref-138346-S20046715902002040900000) .
4. It is not necessary to discharge the refrigerant system to remove the A/C pressure cutoff switch.

Scheme 204

The spring lock coupling is a refrigerant line coupling held together by a garter spring inside a circular cage. The spring lock coupling is used to connect the A/C compressor manifold and tube assembly (inlet) to the TXV manifold and tube assembly (outlet).

1. When the coupling is connected together, the flared end of the female fitting slips behind the garter spring inside the cage of the male fitting.
2. The garter spring and cage then prevent the flared end of the female fitting from pulling out of the cage.
3. Three O-ring seals are used to seal between the thermostatic expansion valve outlet tube and the compressor inlet tube. All other couplings have two O-ring seals.
4. Use only the O-ring seals listed in the Ford Master Parts Catalog for the spring lock coupling.
5. An A/C tube lock coupling clip is used to secure the coupling.

Peanut Fitting

The A/C condenser core and the connection between the receiver drier manifold assembly (outlet) and the TXV manifold and tube assembly (inlet) use the peanut-shaped refrigerant fittings instead of spring lock couplings.

Scheme 205

1. The male and female blocks of the peanut fitting are retained with a nut.
2. An O-ring seal is installed around the tube on the male block.
3. When correctly assembled, the male and female fittings should be flush.

Service Gauge Port Valves

The high-pressure service gauge port valve is located on the A/C receiver drier manifold and tube assembly.

The low-pressure service gauge port valve is located on the manifold of the A/C compressor manifold and tube assembly at the A/C compressor.

Scheme 206

The fitting is an integral part of the refrigeration line or component.

1. Special couplings are necessary for both the high side and low side service gauge ports.
2. A new Schrader-type valve core can be installed if the seal leaks.
3. Always install the A/C charging valve cap on the service gauge port valves after repairing the refrigerant system.

Refer to CLIMATE CONTROL SYSTEM-GENERAL INFORMATION .

Material

MATERIAL SPECIFICATION

MATERIAL SPECIFICATION

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1. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
2. Disconnect the air outlet tube. .
3. Remove the nut and disconnect the manifold from the receiver/drier.
4. Remove the bolt and remove the receiver/drier.
5. Remove the bracket from the receiver/drier.
6. To install, reverse the removal procedure. Install new O-rings 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-204566) .

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1. Disconnect the battery. For additional information, refer to «BATTERY, MOUNTING & CABLES»(ref-204581) .
2. Disconnect the connector.
3. Remove the pressure transducer.
4. To install, reverse the removal procedure. Lubricate the O-ring seal with PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B.

MATERIAL SPECIFICATION

Scheme 211

1. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
2. Remove the A/C compressor pressure relief valve.
3. To install, reverse the removal procedure. Install a new O-ring seal lubricated in clean PAG oil.

MATERIAL SPECIFICATION

MATERIAL SPECIFICATION

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1. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
2. Raise and support the vehicle. For additional information, refer to «JACKING & HOISTING»(ref-232595-S06496072622006051700000) .
3. Disconnect the peanut fitting. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
4. Remove the screws and remove the air deflector.
5. Remove the air deflector. Remove the pin-type retainers. Remove the side-clip retainers.
6. Disconnect the peanut fitting. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
7. Lower the vehicle.
8. Remove the air cleaner outlet tube. .
9. Remove the nut.
10. Remove the receiver drier mounting bracket clamp bolt. Move the receiver drier away from the fan shroud and remove the receiver drier.
11. Remove the receiver drier manifold assembly.
12. To install, reverse the removal procedure. Install new O-rings lubricated in clean PAG oil. Lubricate the refrigerant system with the correct amount of clean PAG oil.

MATERIAL SPECIFICATION

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1. Disconnect the battery. For additional information, refer to «BATTERY, MOUNTING & CABLES»(ref-204581) .
2. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
3. Disconnect the air outlet tube and position aside. .
4. Disconnect the electrical connector.
5. Remove the nut and disconnect the peanut fitting. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
6. Raise the vehicle. For additional information, refer to «JACKING & HOISTING»(ref-232595-S06496072622006051700000) .
7. Remove the screws and remove the LH and RH sight shields (LH shown, RH similar).
8. Remove the screws and remove the air deflector.
9. Remove the refrigerant line bracket bolt.
10. Disconnect the spring lock coupling. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
11. Loosen the bolt and remove the A/C compressor manifold and tube assembly.
12. To install, reverse the removal procedure. Install new O-rings 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-204566) .

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1. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
2. Remove the fresh air inlet duct. .
3. Drain the engine coolant. For additional information, refer to «ENGINE COOLING»(ref-204560) .
4. Disconnect the heater hoses from the heater core.
5. Remove the forward heater hose mounting bolt at the RH shock tower.
6. Raise and support the vehicle. For additional information, refer to «JACKING & HOISTING»(ref-232595-S06496072622006051700000) .
7. Remove the RH splash shield.
8. Remove the rear heater hose mounting bolt from the body side and position the heater hose assembly aside.
9. Disconnect the spring lock coupling. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
10. Remove the nut and disconnect the peanut fitting. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
11. Remove the refrigerant line bracket bolt.
12. Lower the vehicle.
13. Loosen the two mounting bolts. Lift off and set aside the power steering reservoir.
14. Remove the refrigerant line bracket bolts and position the bracket aside.
15. Remove the refrigerant line bracket bolt.
16. Disconnect the coolant recovery line.
17. Disconnect the differential pressure feedback EGR (DFPE) sensor. Disconnect vacuum hoses. Disconnect electrical connector.
18. Remove wire harness retaining nuts and position wire harness aside.
19. Remove the two harness bracket retaining bolts and remove the harness bracket.
20. Loosen the bolt and remove the thermostatic expansion valve manifold and tube assembly.
21. To install, reverse the removal procedure. Lubricate the O-ring seal with PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B. Make sure that the heater hoses are connected correctly to the heater core. For additional information, refer to «HEATING & VENTILATION»(ref-204569) . Lubricate the coolant hoses with MERPOL(R) or plain water, if needed.

Scheme 240

1. Disconnect the battery. For additional information, refer to «BATTERY, MOUNTING & CABLES»(ref-204581) .
2. Recover the refrigerant. For additional information, refer to «CLIMATE CONTROL SYSTEM-GENERAL INFORMATION»(ref-204566) .
3. Remove the evaporator core. For additional information, refer to «EVAPORATOR CORE»(ref-204570-S28394624312005111300000) .
4. Disconnect the thermostatic expansion valve fittings.
5. To install, reverse the removal procedure. Lubricate the O-ring seals with PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B.