How Do A/C Compressor Cut-Out Switches Relate to Refrigerant Pressure Sensor Service and Repair on Mercury Grand Marquis?

The service process for the refrigerant pressure sensor/switch begins with un-connecting the wire harness connector followed by A/C pressure cutoff switch removal. After removal the installation process should begin in reverse order while using PAG oil to lubricate the O-ring seal and its equivalent alternatives.

How to Service the Refrigerant Pressure Sensor and A/C Compressor Cut-Out Switches on Mercury Mariner?

The installation of a new A/C cycling switch requires disruptance of the electrical connector from the A/C cycling switch. The service starts with disconnecting and discarding the O-ring seal from the A/C cycling switch. The new switch must be tightened up to 3 Nm (27 lb-inch) while also using a fresh O-ring seal during installation. The A/C cycling switch installation finishes after performing the reverse order of removal steps.

How to Service the A/C Compressor Cut-Out Switches on Mercury Cougar?

Service of the refrigerant pressure sensor/switch requires you to disconnect the electrical connector followed by removing the high-pressure cut-off switch. The installation of the new switch should only use new O-ring seals which should be coated with refrigerant oil. The installation should follow the opposite steps of removal procedures and a test of normal air conditioning system operation should conclude the process.

OEM Mercury A/C Compressor Cut-Out Switches

HVAC Cut-Out Switch

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9 A/C Compressor Cut-Out Switches found

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Mercury Pressure Switch
Part Number: 8C3Z-19D594-A
$31.65 MSRP: $50.25
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Product Specifications
- Other Name: Switch - Air Conditioning System; A/C Refrigerant Pressure Sensor; A/C Clutch Cycle Switch; HVAC Switch; Cut-Off Valve; High Pressure Cut-Off Switch; Switch
- Replaces: YF1Z-19D594-AA, 4C2Z-19D594-AA
Fits the following Mercury Models:
- Grand Marquis | 2001-2002 | GS, LS | 8 Cyl 4.6 L GAS
- Mariner | 2005-2007 | Base, Convenience, Hybrid, Luxury, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
- Sable | 2000-2005 | GS, LS, LS Premium, Platinum Edition | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Pressure Switch
Part Number: 6L3Z-19D594-A
$52.41 MSRP: $86.24
You Save: $33.83 (40%)
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Product Specifications
- Other Name: Switch - Air Conditioning System; A/C Refrigerant Pressure Sensor; A/C Clutch Cycle Switch; HVAC Switch; Cut-Off Valve; High Pressure Cut-Off Switch; Pressure Cut-Off Switch; Switch
- Replaces: F5TZ-19D594-AA
Fits the following Mercury Models:
- Mountaineer | 1997-2001 | Base | 6 Cyl 4.0 L GAS, 8 Cyl 5.0 L GAS
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Mercury Pressure Switch, Front
Part Number: 6F9Z-19D594-AA
$81.96 MSRP: $132.24
You Save: $50.28 (39%)
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Product Specifications
- Other Name: Switch - A/C System - Vacuum; A/C Safety, Compressor, Trinary Switches; HVAC Pressure, System Switches; A/C Switch; Cut-Off Valve; High Pressure Cut-Off Switch; Clutch Cycling Switch; Pressure Switch
- Position: Front
- Replaces: F6CZ-19D594-CB, 6L2Z-19D594-BA
Fits the following Mercury Models:
- Grand Marquis | 2003-2011 | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
- Marauder | 2003-2004 | Base | 8 Cyl 4.6 L GAS
- Mariner | 2009-2011 | Base, Premier | 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
- Montego | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
- Monterey | 2004-2007 | Base, Convenience, Luxury, Premier | 6 Cyl 4.2 L GAS
- Mountaineer | 2006-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Pressure Switch
Part Number: 8L8Z-19D594-A
$26.15 MSRP: $42.20
You Save: $16.05 (39%)
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Product Specifications
- Other Name: Switch – AC System Vacuum; Refrigerant Pressure Sensor; Compressor Cut-Out & Trinary HVAC Switch; Switch Assembly; High Pressure Cut-Off Switch
- Manufacturer Note: Switch - Air Conditioning Pressure Cut-Off
- Replaces: XS7Z-19D594-AA
Fits the following Mercury Models:
- Cougar | 2001-2002 | Base, S, V6 | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
- 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), 6 Cyl 3.0 L GAS
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Mercury Pressure Switch
Part Number: 6L2Z-19D594-AA
$43.33 MSRP: $68.80
You Save: $25.47 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Switch - Air Conditioning System; HVAC Pressure Switch; A/C Compressor Cut-Out; Trinary Switch.; High Pressure Cut-Off Switch
- Replaces: F3AZ-19D594-C
Fits the following Mercury Models:
- Mountaineer | 2002-2005 | 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 Pressure Switch
Part Number: 6E5Z-19D594-AA
$50.61 MSRP: $83.27
You Save: $32.66 (40%)
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Product Specifications
- Other Name: Switch - Air Conditioning System; A/C Clutch Cycle; HVAC Pressure; A/C Safety; Compressor Cut-Out; Trinary Switch
Fits the following Mercury Models:
- Milan | 2006-2011 | Base, Hybrid, Premier | 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 Pressure Switch
Part Number: F58Z-19D594-A
$58.05 MSRP: $89.17
You Save: $31.12 (35%)
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Product Specifications
- Other Name: Switch - Air Conditioning System; A/C Compressor Cut-Out, Pressure, Trinary Switch.; Cut-Off Valve; Cut-Off Switch; Switch Assembly
Fits the following Mercury Models:
- Cougar | 1999-2000 | Base, V6 | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
- Mystique | 1995-2000 | Base, GS, GS Spree, LS, LS Young America | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
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Mercury Pressure Switch
Part Number: F5CZ-19D594-AA
Product Specifications
- Other Name: Switch - Air Conditioning; A/C Safety & Compressor Cut-Out Switch; HVAC Pressure & Trinary Switch.; Switch - Air Conditioning System - Vacuum
- Replaces: F3DZ-19D594-A, F4CZ-19D594-A
Fits the following Mercury Models:
- Grand Marquis | 1998-2000 | GS, LS | 8 Cyl 4.6 L GAS
- Sable | 1996-1999 | G, GS, LS, LS Premium | 6 Cyl 3.0 L GAS
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Mercury Pressure Switch
Part Number: F4XY-19D594-A
Product Specifications
- Other Name: Switch - Air Conditioning System; A/C Compressor Cut-Out, Pressure, Trinary Switch.; High Pressure Cut-Off Switch
- Manufacturer Note: integral or dlr installed A/C
Fits the following Mercury Models:
- Villager | 1994-2002 | Base, Estate, GS, LS, Nautica, Sport | 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L GAS

Mercury A/C Compressor Cut-Out Switches Parts Questions & Experts Answers

Pressure Switch
8C3Z-19D594-A
Q: How Do A/C Compressor Cut-Out Switches Relate to Refrigerant Pressure Sensor Service and Repair on Mercury Grand Marquis?
A: The service process for the refrigerant pressure sensor/switch begins with un-connecting the wire harness connector followed by A/C pressure cutoff switch removal. After removal the installation process should begin in reverse order while using PAG oil to lubricate the O-ring seal and its equivalent alternatives.
Pressure Switch
8C3Z-19D594-A
Q: How to Service the Refrigerant Pressure Sensor and A/C Compressor Cut-Out Switches on Mercury Mariner?
A: The installation of a new A/C cycling switch requires disruptance of the electrical connector from the A/C cycling switch. The service starts with disconnecting and discarding the O-ring seal from the A/C cycling switch. The new switch must be tightened up to 3 Nm (27 lb-inch) while also using a fresh O-ring seal during installation. The A/C cycling switch installation finishes after performing the reverse order of removal steps.
Pressure Switch
8L8Z-19D594-A
Q: How to Service the A/C Compressor Cut-Out Switches on Mercury Cougar?
A: Service of the refrigerant pressure sensor/switch requires you to disconnect the electrical connector followed by removing the high-pressure cut-off switch. The installation of the new switch should only use new O-ring seals which should be coated with refrigerant oil. The installation should follow the opposite steps of removal procedures and a test of normal air conditioning system operation should conclude the process.