How to Service the A/C Expansion Valve on Mercury Mariner?

Begin recovery of refrigerant before working on the thermostatic expansion valve (TXV). Disconnect the TXV fitting by rotating its nut and then take off the parts including all gasket seals. Eliminate the two TXV bolts first along with the TXV from the system while getting rid of its O-ring seals. Following uninstall steps, tighten the TXV stud to 6 Nm (53 lb-in) before adding the TXV fitting nut. Put new gasket and O-ring parts in place and finish the process by taking the air out of the system and checking for leaks before adding refrigerant. A new receiver/drier must replace the old unit when physical signs show a broken A/C compressor or receiver/drier damage.

How to Service and Repair the A/C Expansion Valve on Mercury Milan?

On 3.0L vehicles, you need to take off the lower cowl panel grille before you can service and fix the A/C expansion valve. Remove the refrigerant from the system before disconnecting the A/C pressure transducer electrical connector and removing the wire harness from the A/C expansion valve stud. First, unscrew the A/C expansion valve fitting nut and remove the fitting, discarding its gasket seals. After putting everything back, you must fasten the fitting at 15 Nm (11 lb-ft) torque. Unscrew the two A/C expansion valve bolts and carefully take out the valve, discarding its sealing gaskets. Reassemble the system by reversing the installation process. Use fresh gasket seals and fill the refrigerant system with the needed amount of clean PAG oil. Afterward, charge the system with refrigerant while checking for any leaks. You need to replace the A/C desiccant cartridge physically only when the system shows signs of contamination that harm the compressor or damage the cartridge.

OEM Mercury A/C Expansion Valve

Air Conditioning Expansion Valve

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8 A/C Expansion Valves found

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Mercury Expansion Valve, Rear Part Number: YF2Z-19849-AA
$25.50 MSRP: $34.71
You Save: $9.21 (27%)
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Product Specifications
- Other Name: Valve Assembly - Evaporative Emission; A/C Expansion Valve, Rear; Control Valve; Heater Control Valve; Valve Assembly - Evaporator Expansion; A/C Expansion Valve
- Manufacturer Note: Aux unit
- Position: Rear
- Replaces: XF2Z-19849-AA
Fits the following Mercury Models:
- Monterey | 2004-2007 | Base, Convenience, Luxury, Premier | 6 Cyl 4.2 L GAS
- Mountaineer | 2003-2005 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Expansion Valve Part Number: AL8Z-19849-A
$38.07 MSRP: $60.45
You Save: $22.38 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve Assembly - Evaporator Expansion; A/C Expansion Valve
- Replaces: 8L8Z-19849-A
Fits the following Mercury Models:
- Mariner | 2008-2011 | Base, Hybrid, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Expansion Valve Part Number: AE5Z-19849-A
$38.77 MSRP: $61.56
You Save: $22.79 (38%)
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Product Specifications
- Other Name: Valve Assembly - Evaporator Expansion; A/C Expansion Valve
- Manufacturer Note: includes o-ring
Fits the following Mercury Models:
- Milan | 2010-2011 | Base, Hybrid, Premier | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX
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Mercury Expansion Valve, Front Part Number: 8G1Z-19849-A
$21.25 MSRP: $33.75
You Save: $12.50 (38%)
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Product Specifications
- Other Name: Valve Assembly - Evaporator Expansion; A/C Expansion Valve, Front; A/C Expansion Valve
- Manufacturer Note: Includes Attaching Hardware
- Position: Front
- Replaces: 5F9Z-19849-CA
Fits the following Mercury Models:
- Montego | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Expansion Valve Part Number: 6E5Z-19849-AA
Product Specifications
- Other Name: Valve Assembly - Evaporator Expansion; A/C Expansion Valve
- Manufacturer Note: includes o-ring
Fits the following Mercury Models:
- Milan | 2006-2009 | Base, Premier | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mercury Expansion Valve Part Number: 6M6Z-19849-AA
Product Specifications
- Other Name: Valve Assembly - Evaporator Expansion; A/C Expansion Valve
- Replaces: 5M6Z-19849-AA, YG-391
Fits the following Mercury Models:
- Mariner | 2006-2007 | Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV)
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Mercury Expansion Valve, Rear Part Number: F4XY-19849-A
Product Specifications
- Other Name: Valve Assembly - Evaporator Expansion; A/C Expansion Valve, Rear; A/C Expansion Valve
- Position: Rear
- Replaces: F3XY-19849-A
Fits the following Mercury Models:
- Villager | 1993-1998 | GS, LS, Nautica | 6 Cyl 3.0 L GAS
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Mercury Expansion Valve Part Number: 9M6Z-19849-A
Product Specifications
- Other Name: Valve Assembly - Evaporator Expansion; A/C Expansion Valve
- Replaces: 8M6Z-19849-A, YG-407
Fits the following Mercury Models:
- Mariner | 2008-2009 | Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)

Mercury A/C Expansion Valve

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Mercury A/C Expansion Valve Parts and Q&A

Expansion Valve
AL8Z-19849-A
Q: How to Service the A/C Expansion Valve on Mercury Mariner?
A:
Begin recovery of refrigerant before working on the thermostatic expansion valve (TXV). Disconnect the TXV fitting by rotating its nut and then take off the parts including all gasket seals. Eliminate the two TXV bolts first along with the TXV from the system while getting rid of its O-ring seals. Following uninstall steps, tighten the TXV stud to 6 Nm (53 lb-in) before adding the TXV fitting nut. Put new gasket and O-ring parts in place and finish the process by taking the air out of the system and checking for leaks before adding refrigerant. A new receiver/drier must replace the old unit when physical signs show a broken A/C compressor or receiver/drier damage.
Expansion Valve
6E5Z-19849-AA
Q: How to Service and Repair the A/C Expansion Valve on Mercury Milan?
A:
On 3.0L vehicles, you need to take off the lower cowl panel grille before you can service and fix the A/C expansion valve. Remove the refrigerant from the system before disconnecting the A/C pressure transducer electrical connector and removing the wire harness from the A/C expansion valve stud. First, unscrew the A/C expansion valve fitting nut and remove the fitting, discarding its gasket seals. After putting everything back, you must fasten the fitting at 15 Nm (11 lb-ft) torque. Unscrew the two A/C expansion valve bolts and carefully take out the valve, discarding its sealing gaskets. Reassemble the system by reversing the installation process. Use fresh gasket seals and fill the refrigerant system with the needed amount of clean PAG oil. Afterward, charge the system with refrigerant while checking for any leaks. You need to replace the A/C desiccant cartridge physically only when the system shows signs of contamination that harm the compressor or damage the cartridge.