Four Seasons 74941 HVAC Heater Control Valve

Four Seasons 74941 Heater Valve

The Four Seasons 74941 is a rotary electronic heater valve built for Mercedes-Benz HVAC temperature control systems. It uses an electric bypass-valve design with a plastic body and 4 connectors to regulate coolant flow through the heater circuit.

Four Seasons Heater Valve parts are backed by more than 50 years of mobile A/C experience and are engineered and tested for dependable operation in demanding climate-control applications.

Key Features

• Rotary electronic heater valve for HVAC temperature control
• Electric valve operation with bypass style design
• Plastic construction for Mercedes-Benz heater valve applications
• 4 connectors for the specified electrical connection layout
• Opening dimensions: 0.78 in, 0.71 in, 0.71 in, and 0.70 in
• Cross-reference part numbers include Gates EHV140 and Genuine 2308300084

Product Details

This heater control valve is used in Mercedes-Benz climate systems that require precise coolant routing to manage cabin heat output. The Four Seasons 74941 is listed for applications including Mercedes-Benz S-Class, Maybach S-Class, SL-Class, and SLR McLaren models, including 2018-2019 Mercedes-Benz S450, S560, Maybach S560, and Maybach S650, as well as 2014-2017 Mercedes-Benz S550 and 2003-2006 Mercedes-Benz SL500. If you are searching for a Mercedes-Benz heater valve replacement or a Four Seasons 74941 heater control valve, this part matches the specified OE-style application data.

What It Helps Address

• Inconsistent cabin heat output
• Heater flow that stays open or closed when it should modulate
• Temperature control issues in Mercedes-Benz HVAC systems
• Faults related to an electric heater valve with 4 connectors
• Replacement needs for a bypass-style heater valve assembly

Installation Notes

Verify connector count, opening dimensions, and valve style before installation. Confirm the vehicle’s year, make, and model against the listed fitment for the Four Seasons 74941, especially on Mercedes-Benz S-Class, Maybach S-Class, SL-Class, and SLR McLaren applications. Match the electrical connector layout and coolant hose routing to the original part before service.

Quality Assurance

Four Seasons states that its HVAC products are engineered and tested for years of trouble-free operation. The brand also notes more than 50 years of mobile A/C experience behind this heater valve line.