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%)
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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

If you own Mercury and want to keep it in top shape, choosing OEM A/C Expansion Valve is a smart move. They are precisely engineered and follow strict factory standards. They are made in advanced facilities that use cutting edge technology. Each part goes through thorough testing to confirm strength and safety, so you can trust it. FordPartsDeal.com gives you genuine Mercury A/C Expansion Valve at some of the affordable online prices without cutting quality. Every OEM Mercury part includes the manufacturer's warranty, easy returns, and super-fast delivery. So why wait? Shop now and get your vehicle back to peak condition.

Mercury A/C Expansion Valve is the metering gate that is accurate and feeds the refrigerant into the evaporator, drops the pressure, and stops freezing up, and squeezes every ounce of cold. Mercury was born in 1939 and struck a nice middle ground between bare-bones commuters and swollen luxury barges. Suspension tuning absorbed potholes without reducing the wheel to mush and the Mercury cabins were muted down by heavier glass and additional insulation. The seats were moved in further than competitors and tall drivers found knee space that they had never dreamed of and with wide door access, every grocery trip was easy. The Cougar was able to demonstrate that sporty could still ride smoothly and the Grand Marquis how body-on-frame strength could be combined with value. Although the gadgets continued to accumulate, you could still easily control the fan's speed even without looking at the road by using your fingers. This balance makes older models of Mercury still worth repairing, particularly once an older A/C Expansion Valve starts to starve out the evaporator and rob a person of summer comfort. At the moment, you need to replace the A/C Expansion Valve, get out all the refrigerant in order to prevent the discharge of stray vapors to hit you. Tear off the glove box or kick panel to expose the valve next to the evaporator, loosen the fittings, and remove the worn-out unit. Fit new O-rings that are lightly oiled, install the new A/C Expansion Valve in the same position, and tighten the lines, but not gorilla tight. Fix insulation, pull vacuum, refill to specifications, sniff every connection to find leaks, and ensure the outlet tube sweats like iced soda, then put Mercury back to appropriate coldness.

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.