OE Quality
60-Day Returns

Four Seasons 37533 HVAC Blend Door Actuator - Main
Reliable HVAC Blend Door Actuator for Ford and Mercury Vehicles
The Four Seasons Air Door Actuator 37533 is designed to restore proper airflow control in your Ford Expedition, Explorer, Explorer Sport Trac, or Mercury Mountaineer. This HVAC blend door actuator ensures precise temperature regulation by controlling the air door linkage within the vehicle's climate system.
- Compatible with Ford Expedition, Explorer, Explorer Sport Trac, and Mercury Mountaineer
- HVAC blend door actuator with male door linkage
- Equipped with 4 mounting ears for secure installation
- Features 8 terminal pins for reliable electrical connection
- Part number 37533 from Four Seasons Air Door Actuator line
Product Details and Specifications
The Four Seasons Air Door Actuator 37533 is engineered to replace the HVAC blend door actuator in select Ford and Mercury models. It features a male door linkage that interfaces directly with the vehicle’s air door mechanism, allowing for accurate modulation of airflow between heating and cooling modes. The actuator includes four mounting ears, providing a stable and secure fit within the HVAC housing. Additionally, the unit has eight terminal pins, ensuring a consistent electrical connection for proper actuator function.
The Air Door Actuator product line by Four Seasons focuses on delivering precise control components for vehicle HVAC systems. This line is designed to meet OEM specifications, providing dependable operation and compatibility with factory wiring and mounting points. The 37533 actuator is part of this line, offering a direct replacement solution for affected Ford and Mercury vehicles.
Common Applications and Problem Resolution
- Restores proper airflow direction and temperature control in HVAC systems
- Eliminates issues with inconsistent cabin temperature regulation
- Resolves clicking or knocking noises from faulty blend door actuators
- Fixes failure of air doors to open or close correctly
- Addresses HVAC system error codes related to blend door actuator malfunction
Installation Notes and Tips
When installing the Four Seasons Air Door Actuator 37533, ensure the vehicle’s battery is disconnected to prevent electrical shorts. Carefully remove the old actuator, noting the position of the male door linkage and mounting ears. Align the new actuator’s linkage and mounting ears precisely to avoid binding or misalignment. Verify the eight terminal pins are fully seated in the connector to maintain electrical integrity. After installation, test the HVAC system to confirm proper operation of the blend door actuator.
Quality Assurance and Warranty
Four Seasons manufactures the Air Door Actuator 37533 to meet stringent quality standards, ensuring reliable performance in Ford and Mercury HVAC systems. This part undergoes rigorous testing for durability and fitment accuracy. While specific warranty details may vary, Four Seasons typically offers a limited warranty covering defects in materials and workmanship for this product line.
| Brand | Four Seasons |
| Part Number | 37533 |
| Position | Air Door Actuator, Main |
| Door Linkage | Male |
| Mounting Ear Qty. | 4 |
| Style | HVAC Air Door Actuator |
| Terminal Pin Qty. | 8 |
This part fits 29 vehicles. Search below:
| Year | Make | Model | Submodel | Position | Notes |
|---|---|---|---|---|---|
| 2010 | Ford | Explorer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2010 | Ford | Explorer | Limited | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator |
| 2010 | Ford | Explorer | XLT | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator |
| 2010 | Ford | Explorer | XLT Base | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator |
| 2010 | Ford | Explorer Sport Trac | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2010 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2009 | Ford | Explorer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2009 | Ford | Explorer Sport Trac | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2009 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2008 | Ford | Explorer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2008 | Ford | Explorer Sport Trac | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2008 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2007 | Ford | Explorer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2007 | Ford | Explorer Sport Trac | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2007 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2006 | Ford | Expedition | Main | With manual HVAC control.; Air Door Actuator | |
| 2006 | Ford | Explorer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2006 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2005 | Ford | Expedition | Main | With manual HVAC control.; Air Door Actuator | |
| 2005 | Ford | Explorer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2005 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2004 | Ford | Expedition | Main | With manual HVAC control.; Air Door Actuator | |
| 2004 | Ford | Explorer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2004 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2003 | Ford | Expedition | Main | With manual HVAC control.; Air Door Actuator | |
| 2003 | Ford | Explorer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2003 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator | |
| 2002 | Ford | Explorer | Main | To 2/02; Air Door Actuator | |
| 2002 | Mercury | Mountaineer | Main | ATC relay connector incompatible with HVAC blower motor resistor harness.; Air Door Actuator |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.