Four Seasons 73800 HVAC Mode Door Actuator - Left

HVAC Mode Door Actuator Overview

The Four Seasons 73800 HVAC mode door actuator is built for climate control systems that need precise air-door movement and reliable operation. It is a direct-fit style replacement for select Acura applications, including Fits 2015-2017 Acura TLX, N/A, Fits 2009-2014 Acura TL, left, and Fits 2010-2013 Acura ZDX, left.

Key Features

• HVAC air door actuator style for mode door control
• Male door linkage for the specified application
• 4 mounting ears for secure attachment
• 7 terminal pins for the correct electrical connection
• Four Seasons part number 73800 for easy identification

Detailed Description

Four Seasons 73800 is an HVAC mode door actuator used to move the air door inside the climate control housing so the system can direct airflow where it is selected. This part is relevant for Acura TLX, Acura TL, and Acura ZDX models listed above, and it cross-references 79140TK4A41 for the same application. Four Seasons draws on more than 50 years of mobile A/C experience, and this actuator is engineered and tested for dependable operation in the HVAC system.

What It Helps Fix

• Incorrect airflow direction from the dash vents
• Air not switching properly between vent, floor, and defrost modes
• Sticking or unresponsive HVAC air door movement
• Electrical actuator failure in the climate control system

Installation Notes and Tips

Verify connector style, terminal count, linkage type, and mounting ear layout before installation. Confirm the vehicle application and position match the listing for the Acura TLX, Acura TL, or Acura ZDX. Use the part number 73800 to compare against the original component and the vehicle’s service information.

Quality Assurance

Four Seasons states that its products are engineered and tested for years of trouble-free operation. The brand also notes more than 50 years of mobile A/C experience behind this HVAC component.