Four Seasons 74631 HVAC Heater Control Valve

Four Seasons 74631 Heater Valve Overview

Four Seasons 74631 is an OE replacement HVAC heater control valve built for cable-operated heating systems. It uses a non-bypass, closed design with two hose connectors and a 0.625 in. (15.875 mm) opening for direct-fit service on select Honda and Acura applications.

The Four Seasons Heater Valve line focuses on replacement parts that match original equipment function and fit. This 74631 heater valve is a practical choice for restoring coolant flow control in vehicles such as the Honda Civic, Honda CR-V, Honda Element, and Acura RSX.

Key Features

• Cable-operated HVAC heater control valve
• Non-bypass, closed valve design
• OE replacement construction
• Plastic body material
• Two hose connectors
• 0.625 in. / 15.875 mm opening size
• Four Seasons 74631 part number for direct identification

Detailed Product Description

Four Seasons 74631 is designed for heater circuit coolant control in cable-actuated HVAC systems. The non-bypass configuration means coolant flow is controlled through the valve rather than routed around it, which is important when replacing an original heater valve on vehicles that use this style of operation. This part number is commonly referenced for Honda Civic, Honda CR-V, Honda Element, and Acura RSX heater valve applications.

As an OE replacement heater valve, this component is intended to match the original valve style and connection layout. The plastic housing, cable operation, and 2-connector design support straightforward replacement where the factory valve has worn, leaked, or stopped responding to the temperature control cable. Four Seasons 74631 also cross-references UAC HV1217C for the same application.

Vehicle Fitment

• Fits 2003-2011 Honda Element, Heater Valve
• Fits 2002-2006 Acura RSX, Heater Valve
• Fits 2002-2006 Honda CR-V, Heater Valve
• Fits 2001-2005 Honda Civic, Heater Valve

Common Replacement Reasons

• Heater valve leaking coolant
• Temperature control cable no longer opening or closing the valve correctly
• Weak or inconsistent cabin heat
• Stuck closed heater valve restricting heater core flow
• Original valve housing cracked or deteriorated

Installation Notes

Verify the vehicle uses a cable-operated, non-bypass heater valve before installation. Match the hose connector layout and opening size to the original part, and inspect heater hoses, clamps, and the control cable for wear before reassembly. Confirm proper cable travel and coolant flow after installation.

Quality Assurance

Four Seasons 74631 is an OE replacement heater valve from the Four Seasons Heater Valve line, built to match original-style HVAC heater control applications for select Honda and Acura vehicles.