Four Seasons 66601 Heater Valve Coolant Flow Control

The Four Seasons 66601 is a replacement heater valve designed to regulate coolant flow between the engine and heater core. By controlling the flow of hot coolant into the heater core, this valve plays a critical role in maintaining proper cabin temperature and HVAC system performance.

Key Features:

• Direct-fit replacement engineered to match original equipment specifications
• Constructed from durable materials to withstand high-temperature coolant and underhood conditions
• Precision-tested for correct valve actuation and leak-free sealing
• Restores proper hot coolant flow regulation to the heater core
• Manufactured by Four Seasons, the largest aftermarket climate control parts supplier in the industry

Four Seasons is a division of Standard Motor Products and is recognized as the largest aftermarket automotive temperature control parts supplier in the world. Every component undergoes rigorous inspection and validation to ensure fit, form, and function equal to the original equipment part. The 66601 heater valve is an ideal solution for restoring reliable heat output and climate control system performance.