Four Seasons 74913 HVAC Heater Control Valve

Overview of Four Seasons Heater Valve 74913

The Four Seasons Heater Valve 74913 is designed to regulate the flow of coolant in your vehicle's heating system. This vacuum-operated, non-bypass heater valve is an O.E. replacement part compatible with select Audi and Volkswagen models, including the A5, A5 Quattro, Q5, Q7, S4, S5, and Touareg.

• Vacuum closes non-bypass heater valve design
• O.E. replacement ensuring proper fit and function
• Compatible with Audi and Volkswagen models such as A5, Q5, and Touareg
• Part number 74913 for easy identification
• Part of the Four Seasons Heater Valve product line

Four Seasons Heater Valve Product Line Details

The Heater Valve product line from Four Seasons focuses on temperature control components that maintain efficient HVAC system operation. This line includes heater valves engineered to meet original equipment specifications, providing reliable control of coolant flow to the heater core. The 74913 model is a non-bypass valve that uses vacuum to close, ensuring precise temperature regulation in compatible Audi and Volkswagen vehicles.

Product Description and Function

The Four Seasons Heater Valve 74913 is a vacuum-operated non-bypass heater valve designed to control the flow of hot coolant to the heater core. By closing under vacuum, it effectively regulates cabin temperature by allowing or restricting coolant flow. This valve is a direct O.E. replacement, ensuring compatibility and performance for Audi and Volkswagen models such as the A5, A5 Quattro, Q5, Q7, S4, S5, and Touareg. Its non-bypass style means all coolant flows through the heater core when the valve is open, providing consistent heating performance.

Common Applications and Issues Addressed

• Restores proper heater core coolant flow in Audi A5 and Volkswagen Touareg
• Resolves heater valve failure causing no heat or inconsistent cabin temperature
• Eliminates vacuum leaks affecting HVAC system operation
• Replaces faulty non-bypass heater valves in Q5 and S4 models
• Improves HVAC temperature control in Volkswagen Q7 and Audi S5 vehicles

Installation Notes and Tips

• Ensure vacuum lines are properly connected to the valve for correct operation
• Verify compatibility with vehicle make and model before installation
• Inspect surrounding hoses and connections for wear or damage during replacement
• Follow manufacturer torque specifications when securing the valve
• Test HVAC system after installation to confirm proper heater valve function

Quality Assurance and Warranty

Four Seasons Heater Valve 74913 is manufactured to meet or exceed original equipment standards. As an O.E. replacement part, it undergoes quality checks to ensure durability and reliable performance in Audi and Volkswagen vehicles. Warranty coverage details should be confirmed with the product supplier or manufacturer.