Heater Control Valve Coolant Control Valve for Audi A6 RS6 with OEM Specifications and Electric Actuator

This Heater Control Valve with OE numbers 4F1959617B and 4F1959617A is a premium aftermarket replacement designed for Audi A6 and RS6 C6 chassis. It is manufactured strictly to OEM specifications to deliver accurate fitment and stable control for the vehicle HVAC heating and cooling system.

As a key coolant regulating component of the air conditioning system, this electric valve controls the flow of hot coolant into the heater core. It precisely adjusts the cabin air temperature according to climate control signals. A failed heater control valve often leads to inconsistent cabin temperature, no hot air output, warm air blowing when the AC is on, coolant leakage near the firewall, and abnormal HVAC system operation, greatly affecting riding comfort.

The valve housing adopts reinforced high-temperature resistant engineering plastic, paired with high-performance EPDM sealing rings. It features excellent resistance to coolant corrosion, thermal cycling and long-term vibration inside the engine compartment. The built-in electric actuator responds rapidly to control signals, ensuring smooth and reliable valve switching. Every unit undergoes strict leakage and functional testing before packing to eliminate hidden defects.

It supports direct plug-in installation without complicated modification or programming, which effectively reduces labor time for repair technicians. It is a reliable and cost-effective HVAC spare part for auto repair shops, spare parts wholesalers and aftermarket retailers. It helps restore accurate temperature adjustment and normal heating & air conditioning performance for Audi A6 and RS6 models.