Four Seasons 74912 HVAC Heater Control Valve

Rotary Electronic Heater Valve for Prius

Four Seasons 74912 is a rotary electronic heater valve built as an OE replacement for the heating and temperature control system. It is listed for 2004-2009 Toyota Prius applications and is used to regulate coolant flow through the heater circuit for consistent cabin temperature control.

Key Features

• Rotary electronic heater valve design
• OE replacement for direct application matching
• Heater valve type for HVAC temperature control systems
• Fits 2004-2009 Toyota Prius, N/A
• Four Seasons 74912 for service and replacement use

Product Details

This Four Seasons Heater Valve is part of the brand’s heater valve line and is engineered for HVAC temperature control service. The rotary electronic design supports controlled coolant routing through the heater system, helping maintain proper cabin heat output in Toyota Prius models from 2004 through 2009. If you are searching for a Toyota Prius heater control valve, HVAC heater control valve, or Four Seasons 74912 replacement, this part matches the listed OE-style application.

This part cross-references Gates EHV116 for the same application.

Common Replacement Reasons

• No cabin heat or inconsistent heater output
• Temperature changes that do not respond correctly to HVAC commands
• Coolant flow control issues in the heater circuit
• Faulty heater valve operation in a 2004-2009 Toyota Prius

Installation Notes

Verify the vehicle year and HVAC configuration before installation. Confirm the valve orientation, electrical connection, and coolant hose routing match the original part. After installation, refill and bleed the cooling system according to factory service procedures to remove trapped air and restore proper heater performance.

Quality Assurance

Four Seasons 74912 is an OE replacement heater valve built for direct-fit service in the listed Toyota Prius applications. Four Seasons is a recognized aftermarket source for HVAC components, and this part is cataloged for replacement of the original heater valve function.