Four Seasons 74010 HVAC Heater Control Valve

Four Seasons 74010 Heater Valve Overview

The Four Seasons Heater Valve 74010 is an OE replacement HVAC heater control valve built for electric operation in the vehicle’s temperature control system. It uses a multiple solenoid electronic design with a non-bypass layout, thermoplastic and steel construction, and three hose connectors for direct replacement service.

Compatible With 2003-2008 Jaguar S-Type, 2003-2006 Lincoln LS, and 2003-2005 Ford Thunderbird heater valve applications, this part number 74010 is a practical choice when restoring cabin heat control and coolant flow management.

Key Features

• Four Seasons Heater Valve line
• Part number 74010
• OE replacement HVAC heater control valve
• Electric valve operation with multiple solenoid electronic control
• Non-bypass style
• 3 hose connectors and 3 terminals
• Thermoplastic / steel construction
• Opening sizes: 0.625 in and 0.750 in

Product Details

The Four Seasons 74010 is engineered as an HVAC heater control valve for vehicles that regulate heater core coolant flow electronically. Its non-bypass design and multiple solenoid configuration support precise temperature control, while the thermoplastic and steel materials provide a service-ready replacement for worn or leaking original components. This heater valve is listed as an OE replacement and cross-references Gates EHV104 for the same application. The Four Seasons 74010 is used in Jaguar S-Type, Lincoln LS, and Ford Thunderbird heater valve applications across the model years shown below.

Common Problems This Part Can Address

• Loss of cabin heat control
• Coolant flow restriction through the heater circuit
• Heater valve leakage
• Sticking or failed electronic valve operation
• Inconsistent temperature output from the HVAC system

Installation Notes and Tips

• Verify hose connector count, terminal count, and opening sizes before installation.
• Confirm the vehicle uses an electric, non-bypass heater valve layout.
• Inspect hoses, clamps, and electrical connectors for wear before reassembly.
• Transfer or source mounting hardware separately, as it is not included.
• Bleed the cooling system after installation to restore proper heater performance.

Quality Assurance

Four Seasons 74010 is built as an OE replacement heater valve for direct-fit service in the listed applications. It is designed to match the original valve style and connection layout used in compatible Jaguar, Lincoln, and Ford HVAC systems.

• Fits 2003-2008 Jaguar S-Type, Heater Valve
• Fits 2003-2006 Lincoln LS, Heater Valve
• Fits 2003-2005 Ford Thunderbird, Heater Valve