Four Seasons 73780 HVAC Blend Door Actuator - Left or Right

HVAC Blend Door Actuator Overview

The Four Seasons 73780 HVAC blend door actuator is built for climate control systems that need precise air door movement and consistent operation. It is a direct-fit style HVAC air door actuator for select Hyundai and Kia applications, including the Hyundai Elantra, Sonata, Santa Fe, Tucson, and Kia K5.

Use part number 73780 when replacing a worn actuator that causes temperature control problems, clicking noises, or inconsistent airflow direction. This Four Seasons HVAC blend door actuator is engineered for dependable operation in modern heating and air conditioning systems.

Key Features

• HVAC air door actuator design for blend door control
• 5-terminal electrical connection
• Male door linkage
• 3 mounting ears for secure installation
• Four Seasons part number 73780

Detailed Description

Four Seasons 73780 is an HVAC blend door actuator used to move the air door inside the climate control housing so the system can regulate cabin temperature and airflow routing. The actuator style, terminal count, and linkage configuration make it a fitment-specific replacement for select Hyundai and Kia models, including the Hyundai Elantra and Kia Sorento. If your original actuator is sticking, noisy, or no longer responding correctly, this replacement restores normal HVAC door movement.

Four Seasons backs this part with more than 50 years of mobile A/C experience and tests its products for long service life. The 73780 cross-references FEL-PRO 73780 for the same application.

Common Problems This Part Can Solve

• Temperature stuck on hot or cold
• Clicking or ticking from the dash HVAC housing
• Airflow not changing between vents, floor, or defrost
• Inconsistent cabin temperature control
• Failed or unresponsive blend door movement

Installation Notes and Tips

Verify connector style, linkage type, and mounting ear layout before installation. Confirm fitment by year, make, model, and position, especially for Hyundai Tucson USA-built applications and the Kia Sportage right-side listing. After installation, cycle the HVAC controls to allow the actuator to relearn its range if required by the vehicle system.

Quality Assurance

Four Seasons engineers and tests its HVAC components for dependable operation, drawing on more than 50 years of mobile air conditioning experience. Part number 73780 is built for long-term service in compatible climate control systems.