Four Seasons 74917 HVAC Heater Control Valve

Mercedes-Benz Heater Valve Replacement

Four Seasons 74917 is a single solenoid electronic heater valve built as an OE replacement for HVAC temperature control service. It is used in heating system repair on select Mercedes-Benz C250 and SLK250 models, helping restore proper coolant flow control through the heater circuit.

Key Features

• Single solenoid electronic heater valve for HVAC temperature control
• OE replacement design for direct-service applications
• Four Seasons Heater Valve product line for heating system repair
• Fits 2012-2015 Mercedes-Benz C250, N/A
• Fits 2012-2015 Mercedes-Benz SLK250, N/A

Product Details

This Four Seasons heater control valve is part of the Heater Valve line and is identified by part number 74917. It is engineered for vehicles that use an electronically controlled heater valve to regulate coolant flow into the heater core. For Mercedes-Benz C250 and Mercedes-Benz SLK250 applications, this valve supports accurate cabin heat control and consistent HVAC operation. This part cross-references Gates EHV122 for the same application.

Common Repair Symptoms

• No heat or inconsistent heat output from the vents
• Heat stuck on or unable to regulate cabin temperature
• Coolant flow issues through the heater circuit
• HVAC temperature changes that do not respond correctly
• Faulty electronic heater valve operation on Mercedes-Benz C250 and SLK250 models

Installation Notes

Verify the original valve style, electrical connection, and hose routing before installation. Confirm vehicle fitment by year and model, then inspect the cooling system for leaks, trapped air, or related HVAC control faults that could affect heater performance after replacement.

Quality Assurance

Four Seasons supplies OE-style replacement HVAC components, and this heater valve is listed as an OE replacement part for the specified applications. Part number 74917 is intended for direct service use on the confirmed Mercedes-Benz fitments shown above.