What is the purpose and location of the HVAC Pressure Switch in A/C systems on Mercury Mariner?

This switch is used only on 2008 and earlier models with accumulators. Later models with receiver/driers don't use a pressure cycling switch. The pressure cycling switch is located on top of the accumulator and detects low refrigerant line pressure at 22 to 28 psi. It switches the A/C system off and then back on again at 40 to 47 psi. If the pressure increases over 550 psi, the pressure cut-off switch shuts the system off. To replace the pressure cycling switch, unplug the electrical connector, unscrew the switch from the accumulator, lubricate the switch o-ring with clean refrigerant oil, screw the new switch onto the accumulator threads until hand tight, and then tighten it securely. Finally, reconnect the electrical connector.

Genuine Mercury Mariner HVAC Pressure Switch

Air Pressure Switch

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15 HVAC Pressure Switches found

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Mercury Mariner Switch - Air Condition System - Vacuum
Part Number: 6F9Z-19D594-AA
$114.67 MSRP: $153.82
You Save: $39.15 (26%)
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Product Specifications
- Replaces: 6L2Z-19D594-BA, F6CZ-19D594-CB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Mariner Valve Assembly
Part Number: 4L3Z-19D701-A
$7.60 MSRP: $11.33
You Save: $3.73 (33%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Valve Assy
- Replaces: 4R3Z-19D701-AA, F8RZ-19D701-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Mariner Valve Assembly
Part Number: E69Z-19D701-A
$4.46 MSRP: $7.27
You Save: $2.81 (39%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Valve Assy
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Valve Assembly
Part Number: F7RZ-19D701-BA
$7.45 MSRP: $11.11
You Save: $3.66 (33%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Assy
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2009 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Mariner Valve Assembly - Pressure Relief
Part Number: F65Z-19D644-AA
$45.38 MSRP: $67.64
You Save: $22.26 (33%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Valve Assy - Pressure Relief
- Replaces: F65Z-19D644-A1A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2006 Mercury Mariner | 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Switch - Air Condition System - Vacuum
Part Number: YC1Z-19E561-BA
$28.21 MSRP: $46.00
You Save: $17.79 (39%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch - Air Condit.System - Vacuum
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Mariner Valve Assembly
Part Number: E3EZ-19D701-AA
$4.88 MSRP: $7.27
You Save: $2.39 (33%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Assy
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2006 Mercury Mariner | 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
View related parts
Mercury Mariner Switch - Air Condition System - Vacuum
Part Number: YF1Z-19D594-AA
$39.16 MSRP: $58.36
You Save: $19.20 (33%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch - Air Condit.System - Vacuum
- Replaced by: 8C3Z-19D594-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Valve Assembly
Part Number: 4R3Z-19D701-AA
$6.42 MSRP: $11.33
You Save: $4.91 (44%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Valve Assy
- Replaced by: 4L3Z-19D701-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2006 Mercury Mariner | 4 Cyl 2.3L Hybrid Gas/Electric DOHC | CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Mariner Valve Assembly - Pressure Relief
Part Number: 8S4Z-19D644-AA
$10.87 MSRP: $17.73
You Save: $6.86 (39%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Assy - Pressure Relief
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.5L Duratec (110kW/150PS), 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Mariner Valve Assembly - Pressure Relief
Part Number: 4L3Z-19D644-A
$11.90 MSRP: $17.73
You Save: $5.83 (33%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Assy - Pressure Relief
- Manufacturer Note: Valve Assy - Air Conditioning Compressor Pressure Relief
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007 Mercury Mariner | 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Mariner Switch - Air Condition System - Vacuum
Part Number: 8L8Z-19D594-A
$27.16 MSRP: $42.20
You Save: $15.04 (36%)
Product Specifications
- Other Name: Switch - Air Condit.System - Vacuum
- Manufacturer Note: Switch - Air Conditioning Pressure Cut-Off
- Replaces: XS7Z-19D594-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Mariner Switch - Air Condition System - Vacuum
Part Number: F5VY-19E561-A
Product Specifications
- Other Name: Switch - Air Condit.System - Vacuum
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
View related parts
Mercury Mariner Switch - Air Condition System - Vacuum
Part Number: AM6Z-19E561-A
Product Specifications
- Other Name: Switch - Air Condit.System - Vacuum; Pressure Cycling Switch, Switch
- Manufacturer Note: Switch - Clutch Cycling Pressure
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2010-2011 Mercury Mariner | 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Mariner Switch - Air Condition System - Vacuum
Part Number: 5M6Z-19E561-AA
Product Specifications
- Other Name: Switch - Air Condit.System - Vacuum; Pressure Cycling Switch, Switch
- Manufacturer Note: Switch - Clutch Cycling Pressure
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2009 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive

Mercury Mariner HVAC Pressure Switch

The Mercury Mariner HVAC Pressure Switch is an essential component of the entire HVAC system. The pressure switch communicates when to run cooling or heating with your Mercury vehicle's climate control module by sending pressure signals. Although small, the HVAC Pressure Switch is essential like the other sensors and relays such as fan relays, blower motor relays, and ambient sensors. This switch can interrupt the entire process and is applied throughout the Mariner line. A malfunctioning HVAC Pressure Switch can trick the module into believing that the pressures are unsafe, thus cutting compressor operation, which can leave the occupants without cooling relief in summer and heating relief in winter and can similarly light irritating fault codes on the dash. If your HVAC Pressure Switch fails generally, replace it before that happens. The weak link rule states that one weak link can bring down the house. Likewise, removing unnecessary strain from larger parts is a good idea. Throughout the production years of Mercury Mariner, the HVAC Pressure Switch has maintained a simple binary design that opens or closes a circuit at defined parameters. As a consequence, differences are little more than the shape of the connector. Regular inspections ensure every Mercury Mariner stays comfortable.

We provide a wide range of Mercury Mariner HVAC Pressure Switch at the optimal prices. If you need Mercury Mariner HVAC Pressure Switch, you can shop with confidence on our website. All our OEM parts come with a manufacturer's warranty and are delivered to your doorstep with a fast delivery service.

Mercury Mariner HVAC Pressure Switch Parts Questions & Experts Answers

Valve Assembly
E3EZ-19D701-AA
Q: What is the purpose and location of the HVAC Pressure Switch in A/C systems on Mercury Mariner?
A:
This switch is used only on 2008 and earlier models with accumulators. Later models with receiver/driers don't use a pressure cycling switch. The pressure cycling switch is located on top of the accumulator and detects low refrigerant line pressure at 22 to 28 psi. It switches the A/C system off and then back on again at 40 to 47 psi. If the pressure increases over 550 psi, the pressure cut-off switch shuts the system off. To replace the pressure cycling switch, unplug the electrical connector, unscrew the switch from the accumulator, lubricate the switch o-ring with clean refrigerant oil, screw the new switch onto the accumulator threads until hand tight, and then tighten it securely. Finally, reconnect the electrical connector.