New Heater Control Valve 431819809A 0008305784 For Audi, Porsche, VW

Heater Control Valve for Audi, Porsche, VW

This heater control valve regulates coolant flow through the heater core, letting the climate system deliver consistent cabin heat, and it cross-references OEM numbers 431819809A and 0008305784.

Overview

The heater control valve for Audi, Porsche, and VW controls how much hot coolant reaches the heater core so the cabin warms as intended. This replacement heater control valve restores proper temperature regulation when the original unit sticks or leaks. It suits owners servicing aging climate systems on these German platforms.

Built For Performance

• Direct-fit design matching the OEM footprint for straightforward replacement
• Sealed internal valve to prevent coolant weeping at the body
• Rated for continuous exposure to hot engine coolant
• Consistent flow control across the full operating range
• Compatible with standard coolant hose clamp connections

Fits These Machines

• for Audi vehicles using OEM 431819809A or 0008305784
• for Porsche vehicles using OEM 431819809A or 0008305784
• for VW vehicles using OEM 431819809A or 0008305784

On-The-Job Use

• Restoring cabin heat after a valve failure
• Replacing a leaking or seized heater control valve
• Climate system service on older Audi, Porsche, and VW models

Specs At A Glance

Good To Know

Q: How do I know the heater control valve needs replacing? A: Common signs include no cabin heat, uneven temperature, or coolant leaks near the valve. A stuck valve often shows as heat that will not shut off or never warms up.

Q: Is bleeding the cooling system needed after installation? A: Yes, air pockets can form once the valve is replaced, so bleed the cooling system and top off coolant before testing cabin heat.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.