HomeHVAC > Gaskets and Sealing SystemsFour Seasons 26721 A/C System O-Ring and Gasket Kit
Part #: 26721

Four Seasons 26721 A/C System O-Ring and Gasket Kit

AC System Seal Kit
⚙️ 111 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦AC System Seal Kit
🚗Fitment: Ford and Lincoln, F-250 Super Duty, F-350 Super Duty, LS, Excursion, Blackwood, F-150, F-250, F-350, Lobo, F-250 HD, Bronco, F-200, and F-100
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Reliable A/C System Seal Kit for Ford and Lincoln Vehicles

The Four Seasons AC System Seal Kit 26721 provides essential sealing components designed to maintain the integrity of your vehicle's air conditioning system. Specifically compatible with Ford and Lincoln models such as the Bronco, F-150, and Excursion, this kit ensures a secure and leak-free A/C system.

  • Includes green rubber O-rings and metal spring O-rings for durable sealing
  • Comprehensive gasket and O-ring kit tailored for A/C system repairs
  • Compatible with Ford Blackwood, Bronco, Excursion, F-100, F-150, F-200, F-250, F-250 HD, F-250 Super Duty, F-350, F-350 Super Duty, and Lincoln LS
  • Part number 26721 for precise identification and fitment
  • Designed to replace worn or damaged seals in automotive HVAC systems

About the Four Seasons AC System Seal Kit Line

The AC System Seal Kit line from Four Seasons focuses on providing high-quality sealing solutions for automotive air conditioning systems. This product line includes O-rings and gaskets made from materials selected for durability and compatibility with refrigerants and system components. The 26721 kit is part of this line, offering a reliable option for maintaining proper A/C system pressure and preventing leaks in Ford and Lincoln vehicles.

Product Details and Material Specifications

This A/C system seal kit features green rubber O-rings combined with metal spring O-rings to ensure a tight, long-lasting seal. The green rubber material is resistant to refrigerants and oils commonly found in automotive A/C systems, while the metal spring O-rings provide additional sealing force and durability under pressure. The kit style includes all necessary gaskets and O-rings to service the A/C system effectively.

Common Applications and Issues Addressed

  • Prevents refrigerant leaks caused by worn or damaged O-rings and gaskets
  • Restores proper sealing in Ford F-150 and Lincoln LS A/C systems
  • Eliminates loss of cooling efficiency due to compromised seals
  • Addresses A/C system pressure drops in Ford Super Duty models
  • Helps maintain system integrity after component replacement or repair

Installation Notes and Tips

When installing the Four Seasons AC System Seal Kit 26721, ensure all old seals and gaskets are fully removed and surfaces are clean. Lubricate the new O-rings with the appropriate refrigerant oil to prevent damage during assembly and to improve sealing performance. Verify compatibility with your specific Ford or Lincoln model before installation. Proper torque specifications should be followed to avoid over-compression of seals.

Quality Assurance and Warranty

Four Seasons provides this AC System Seal Kit 26721 with quality materials designed to meet OEM standards for durability and performance. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty against defects in material and workmanship. Refer to the manufacturer’s documentation for complete warranty information.

BrandFour Seasons
Part Number26721
PositionAC System Seal Kit
DescriptionO-Ring & Gasket A/C System Seal Kit
MaterialGreen Rubber O-Rings, Metal spring O-Ring
StyleO-Ring & Gasket Kit
TypeAC System Seal Kits

This part fits 111 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2008FordF-250 Super Duty6.8LV10N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2008FordF-350 Super Duty6.8LV10N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2007FordF-250 Super Duty6.8LV10N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2007FordF-350 Super Duty6.8LV10N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2006FordF-250 Super Duty6.8LV10N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2006FordF-350 Super Duty6.8LV10N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2006LincolnLSN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2005FordExcursionN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2005LincolnLSN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2004FordExcursionN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2004LincolnLSN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2003FordExcursionN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2003LincolnBlackwoodN/AO-Ring and Gasket Seal Kit; w/ Rear AC; AC System Seal Kit
2003LincolnLSN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2002FordExcursionN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2002LincolnBlackwoodN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2002LincolnLSN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2001FordExcursionN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2001LincolnLSN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2000FordExcursionN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
2000LincolnLSN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1998FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1998FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1998FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1997FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1997FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1997FordF-250 HDN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1997FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1996FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1996FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1996FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1996FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1995FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1995FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1995FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1995FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1994FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1994FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1994FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1994FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1993FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1993FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1993FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1993FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1992FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1992FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1992FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1992FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1991FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1991FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1991FordF-200N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1991FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1991FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1990FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1990FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1990FordF-200N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1990FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1990FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1989FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1989FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1989FordF-200N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1989FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1989FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1988FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1988FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1988FordF-200N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1988FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1988FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1987FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1987FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1987FordF-200N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1987FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1987FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1986FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1986FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1986FordF-200N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1986FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1986FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1985FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1985FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1985FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1985FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1984FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1984FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1984FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1984FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1983FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1983FordF-100N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1983FordF-150N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1983FordF-250N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1983FordF-350N/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1982FordBroncoN/APlease confirm compatibility prior to installation of A/C System O-Ring and Gasket Kit.; AC System Seal Kit
1982FordF-150N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1982FordF-250N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1982FordF-350N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1981FordBroncoN/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1981FordF-150N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1981FordF-250N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1981FordF-350N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1980FordBroncoN/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1980FordF-150N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1980FordF-250N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1980FordF-350N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1979FordBroncoN/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1979FordF-150N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1979FordF-250N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1979FordF-350N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1978FordBroncoN/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1978FordF-150N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1978FordF-250N/AO-Ring and Gasket Seal Kit; AC System Seal Kit
1978FordF-350N/AO-Ring and Gasket Seal Kit; AC System Seal Kit

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

111267211321255267214587801726908022A12582MT2526RS2526

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.