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Lincoln 4L3Z-19D644-A Pressure Relief Valve

2005-2006 Lincoln 4L3Z19D644A

Customer Questions & Expert Answers (3)
4L3Z-19D644-A Ford Pressure Relief Valve Product Photo 1 of 2
4L3Z-19D644-A Ford Pressure Relief Valve Product Photo 1 of 2
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4L3Z-19D644-A Ford Pressure Relief Valve Illustration 1 of 1
  • Part Description
    Valve Assembly - Pressure Relief
  • Base No.
    19D644
  • Manufacturer
    Ford
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  • Specifications
  • Fitment
  • Q&A

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  • Product Specifications

    BrandGenuine Lincoln
    Base No.19D644
    Manufacturer Part Number4L3Z-19D644-A, 4L3Z19D644A
    Part DescriptionPressure Relief Valve; Valve Assembly - Pressure Relief
    Manufacturer NoteValve Assy - Air Conditioning Compressor Pressure Relief
    Item Dimensions6.1 x 4.1 x 4.2 inches
    Item Weight0.60 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerFord
    SKU4L3Z-19D644-A
    WarrantyThis genuine Ford part is guaranteed by Ford's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65

  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2006 Lincoln Mark LT8 Cyl 4.6L Romeo SOHC EFI, 8 Cyl 5.4L4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R70E W/TSS, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 5-Speed Manual Transmission - Mazda M5R2-C, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
    2005-2006 Lincoln Navigator8 Cyl 5.4L4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)

  • Customer Questions & Expert Answers

    Q:
    Is this the correct part for the attached VIN?
    A:
    You can Select Your Vehicle to check if 4L3Z-19D644-A fits your vehicle.
    Posted and answered by Ford Parts Specialist Matthew
    Q:
    What does the HVAC Pressure Switch do when it detects low pressure for the 2007 Ford Escape? Posted by Khrystyna G.
    A:
    The pressure cycling switch switches the A/C system off and then back on again at 40 to 47 psi. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist George / Mar 21, 2025
    Q:
    What does the HVAC Pressure Switch detect for the 2007 Mercury Mariner? Posted by Dick M.
    A:
    The pressure cycling switch detects low refrigerant line pressure at 22 to 28 psi. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist Joseph / Oct 30, 2022

Genuine Ford Part 4L3Z-19D644-A, the Right Choice

To ensure reliability, purchase part # 4L3Z-19D644-A Pressure Relief Valve. It is also called A/C System Valve Core, HVAC Pressure Switch. OEM parts are of high quality and known for their longevity. This is because they are built to the Ford standards which are relatively high and undergo rigorous quality control testing. This part fits specific Lincoln Mark LT, Navigator models.

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