Four Seasons 37531 HVAC Blend Door Actuator - Auxiliary or Main

HVAC Air Door Actuator for Ford and Lincoln

Four Seasons 37531 is an HVAC air door actuator for vehicles with manual or automatic climate control configurations listed below. It controls the blend or air door movement that directs cabin airflow and temperature in Ford, Lincoln, and Mercury applications.

Key Features

• Four Seasons Air Door Actuator line
• HVAC blend door actuator style
• Male door linkage
• 4 mounting ears for secure attachment
• 8 terminal pins for the specified electrical connection
• Direct-fit replacement for select Ford Ranger, Explorer, Expedition, Navigator, Mountaineer, and Explorer Sport Trac applications

Product Details

Built as a Four Seasons HVAC Air Door Actuator, part number 37531 is specified for blend door and air door control in the HVAC system. It is used in applications where the actuator moves the internal door that regulates heated and cooled air delivery. This part cross-references ATE 604202 for the same application.

Fitment includes 1995-2011 Ford Ranger and F-100 Ranger, 1995-2001 Ford Explorer, 2001-2002 Ford Explorer Sport, 2001-2005 Ford Explorer Sport Trac, 2002-2004 Ford Expedition, 2002-2003 Ford Explorer Sport, 2002-2004 Lincoln Navigator, and 1997-2002 Mercury Mountaineer. Confirm the position and notes for your vehicle before ordering, especially on models with ATC, auxiliary HVAC, or D-shaped shaft requirements.

What It Helps Fix

• Temperature stuck on hot or cold
• Airflow not changing between vents, floor, or defrost
• Clicking or ticking from the dash HVAC area
• Blend door movement that is slow, erratic, or unresponsive
• Loss of proper cabin temperature control in Ford Ranger, Explorer, Expedition, or Navigator HVAC systems

Installation Notes

Verify the connector style, terminal count, mounting ear layout, and door linkage before installation. This actuator is listed for Main, Auxiliary, and N/A positions depending on the vehicle application, so match the exact year, model, and notes in the fitment data. On 2002 Ford Explorer and related applications, note the ATC and production-date restrictions shown in the fitment table.

Quality Assurance

Four Seasons supplies HVAC replacement components for service applications, and part 37531 is cataloged to the specified OE-style fitment details above. Use the listed interchange and fitment information to confirm the correct replacement before installation.