Four Seasons 74910 HVAC Heater Control Valve

Four Seasons 74910 Heater Valve Overview

The Four Seasons 74910 is a rotary electronic heater valve for HVAC temperature control. It is an OE replacement heater valve built for direct-fit service on select Nissan Armada and INFINITI QX56 applications.

Use this Four Seasons heater valve when you need precise coolant flow control through the heater core on vehicles equipped with the listed HVAC setup. The Four Seasons Heater Valve line focuses on replacement parts for temperature control service, and part number 74910 is listed for the same application as several OE and aftermarket references.

• Rotary electronic heater valve for HVAC temperature control
• OE replacement part for direct service use
• Fits 2006-2015 Nissan Armada, Heater Valve
• Fits 2006-2010 INFINITI QX56, Heater Valve
• Cross-references Gates 19803 for the same application

Application Details

This heater valve is used to regulate heater core coolant flow in the HVAC system. It is a fitment-based replacement for Nissan Armada and INFINITI QX56 models listed in the application data, including 2006-2015 Nissan Armada and 2006-2010 INFINITI QX56. Part number 74910 is also referenced by OE and aftermarket interchange numbers for these vehicles.

• Restores heater temperature control when the valve no longer opens or closes correctly
• Addresses inconsistent cabin heat output
• Helps correct coolant flow issues through the heater circuit
• Supports HVAC service when the original valve is electrically or mechanically worn

Installation Notes

Verify the vehicle year, make, model, and HVAC configuration before installation. Confirm connector style, hose routing, and valve orientation against the removed part to ensure the replacement matches the original layout. After installation, check the cooling system for proper coolant level and inspect for leaks.

Quality Assurance

Four Seasons supplies HVAC replacement components for temperature control service, and this part is listed as an OE replacement heater valve. Part number 74910 is cataloged for direct application matching on the specified Nissan Armada and INFINITI QX56 vehicles.