Four Seasons 73633 HVAC Mode Door Actuator - Main

HVAC Mode Door Actuator for Nissan and INFINITI

Restore proper air distribution in the cabin with this Four Seasons HVAC mode door actuator. Part number 73633 is built for vehicles that need precise control of the HVAC air door, helping direct airflow to the floor, dash, or defrost outlets as commanded by the climate control system.

Compatible with select Nissan Frontier, Murano, TITAN, TITAN XD, Maxima, Altima, Pathfinder, and INFINITI QX60 and JX35 applications, this actuator is a direct-fit replacement for common OE references including 277313JC1A and 277313SB0A.

Key Features

• Four Seasons HVAC air door actuator construction
• Door linkage style: arm
• Mounting ear quantity: 4
• Terminal pin quantity: 3
• Built for HVAC mode door control in select Nissan and INFINITI vehicles
• Part number 73633 for application matching and service lookup

Detailed Description

This HVAC mode door actuator controls the position of the air door inside the heating and air conditioning housing, allowing the system to route airflow where the driver selects. Four Seasons engineers and tests its mobile A/C components for dependable operation, drawing on more than 50 years of experience in automotive climate control service. Use this part when servicing a Nissan Frontier floor outlet concern or replacing a failed actuator in a Nissan Murano, TITAN, TITAN XD, Maxima, Altima, Pathfinder, or INFINITI QX60 and JX35.

This part cross-references OE-style numbers 277313JC1A and 277313SB0A for the same application. Four Seasons 73633 is a practical replacement choice when the original mode door actuator no longer responds correctly to HVAC commands.

Common Problems This Part Can Address

• Airflow stuck on one vent position
• No change between floor, dash, and defrost settings
• Clicking or repeated movement from the HVAC housing
• Inconsistent cabin air direction after climate control input
• Failed actuator response in the heating and A/C system

Installation Notes and Tips

Verify the connector style, mounting ear layout, and vehicle application before installation. This actuator uses a 3-pin terminal layout and an arm-style door linkage, so matching the original part configuration is important for proper fitment. After installation, cycle the HVAC controls to confirm the mode door moves through each selected position.

Fits 2022-2024 Nissan Frontier, floor; fits 2015-2024 Nissan Murano; fits 2017-2024 Nissan TITAN; fits 2016-2024 Nissan TITAN XD; fits 2016-2023 Nissan Maxima; fits 2014-2020 INFINITI QX60, main; fits 2013-2020 Nissan Pathfinder, main; fits 2013-2018 Nissan Altima; fits 2013 INFINITI JX35, main.

Quality Assurance

Four Seasons backs this HVAC mode door actuator with product engineering and testing focused on long-term, trouble-free operation. Part number 73633 is supported by the brand’s extensive mobile A/C experience and is built for service replacement in select Nissan and INFINITI climate control systems.