Four Seasons 73609 HVAC Mode Door Actuator

HVAC Mode Door Actuator for Honda and Acura

Restore proper air distribution in the cabin with this Four Seasons HVAC mode door actuator, part number 73609. It is built with a gear-style door linkage, a 5-pin terminal layout, and a 4-ear mounting design for a direct-fit replacement in select Honda and Acura applications.

Compatible with 2014-2020 Acura MDX, 2016-2023 Honda Pilot, 2017-2023 Honda Ridgeline, and 2019-2023 Honda Passport, this actuator helps control panel and floor airflow routing when the original unit is worn or unresponsive.

Key Features

• HVAC air door actuator for mode control
• Gear-style door linkage for HVAC blend and mode operation
• 5-terminal pin configuration
• 4 mounting ears for secure installation
• Direct replacement for select Honda and Acura panel/floor applications
• Four Seasons part number 73609

Product Details

Four Seasons 73609 is an HVAC mode door actuator engineered for dependable operation in climate control systems. The actuator moves the mode door that directs airflow to the panel or floor outlets, helping restore correct vent selection in vehicles such as the Honda Pilot, Honda Ridgeline, Honda Passport, and Acura MDX. Four Seasons draws on more than 50 years of mobile A/C experience and tests its products for long service life and consistent performance.

This part cross-references Global Parts Distributors LLC 1712721 for the same application.

What It Helps Fix

• Airflow stuck at one vent position
• No response when changing from panel to floor settings
• Inconsistent HVAC mode selection
• Clicking or binding from a worn actuator gear
• Loss of proper cabin air direction in Honda Pilot, Ridgeline, Passport, or Acura MDX models

Installation Notes and Tips

Verify the connector style, mounting ear layout, and door linkage type before installation. This actuator is listed for panel/floor applications, so confirm the original part location matches the vehicle fitment. After installation, cycle the HVAC controls to confirm the mode door moves smoothly through each setting.

Quality Assurance

Four Seasons states that its HVAC components are engineered and tested for years of trouble-free operation. The brand backs this part with more than five decades of mobile air conditioning experience, supporting a repair-focused replacement for select Honda and Acura climate control systems.