Four Seasons 37534 HVAC Blend Door Actuator - Main

HVAC Air Door Actuator for Ford and Lincoln

Four Seasons 37534 is an HVAC blend door actuator built for vehicles that need precise air door movement for temperature and airflow control. This Four Seasons Air Door Actuator uses a male door linkage, 4 mounting ears, and an 8-pin terminal layout for the listed Ford and Lincoln applications.

Compatible With 1997-2004 Ford F-150, 1997-1999 Ford F-250, 1997 Ford F-250 HD, 1999 Ford F-250 Super Duty, 1997-2002 Ford Expedition, and 1998-2002 Lincoln Navigator applications listed below.

• Four Seasons part number 37534
• HVAC blend door actuator / air door actuator style
• Male door linkage for the specified HVAC door connection
• 4 mounting ears for secure installation
• 8 terminal pins for the listed electrical interface
• Fits Main and N/A positions as shown in the fitment data

Product Details

The Four Seasons Air Door Actuator line is used in HVAC systems where the blend door must move accurately to direct heated or cooled air. Part number 37534 is listed for Ford F-150, Ford Expedition, and Lincoln Navigator applications, along with related F-Series coverage, including 2004 Ford F-150 Main without ATC and 1997-2002 Ford Expedition Main. This part cross-references Autotecnica FD0613094 for the same application.

Common HVAC Problems This Part Addresses

• Incorrect cabin temperature from a blend door that no longer responds properly
• Airflow stuck on one temperature setting in the Ford F-150 or Ford Expedition HVAC system
• Clicking, binding, or inconsistent movement from a worn actuator
• Loss of proper air distribution through the dash vents
• HVAC control issues tied to the blend door actuator circuit

Installation Notes

Verify the connector style, mounting ear layout, and terminal pin count before installation. Fitment notes include ATC-related connector incompatibility on some 2002-2004 Ford F-150, 2004 Ford F-150 Heritage, 1997-2002 Ford Expedition, and 1999-2002 Lincoln Navigator applications, so confirm your HVAC configuration before ordering. Use the vehicle-specific fitment details for the exact position and year range.

Quality Assurance

Four Seasons supplies HVAC replacement components for service applications, and this actuator is cataloged to match the listed OE-style fitment references for Ford and Lincoln vehicles.

• Fits 2004 Ford F-150, Main, w/o ATC (Automatic Temperature Control)
• Fits 2004 Ford F-150 Heritage, N/A, ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator
• Fits 2002-2003 Ford F-150, N/A, ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator
• Fits 1997-2002 Ford Expedition, Main, ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator
• Fits 1999-2002 Lincoln Navigator, Main, ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator
• Fits 1997-2001 Ford F-150, N/A, Air Door Actuator
• Fits 1997-1999 Ford F-250, N/A, Air Door Actuator
• Fits 1999 Ford F-250 Super Duty, N/A, Air Door Actuator
• Fits 1998 Lincoln Navigator, Main, w/o ATC (Automatic Temperature Control)
• Fits 1997 Ford F-250 HD, N/A, Air Door Actuator