HomeHVAC > Temperature Controls and Related ComponentsFour Seasons 74934 HVAC Heater Control Valve
Part #: 74934

Four Seasons 74934 HVAC Heater Control Valve

Heater Valve
⚙️ 6 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Heater Valve
🚗Fitment: Ford, C-Max
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Overview of Four Seasons Heater Valve 74934 for Ford C-Max

The Four Seasons Heater Valve 74934 is a single solenoid electronic heater valve designed specifically for Ford C-Max models. This electric bypass valve controls the flow of coolant to the heater core, ensuring precise temperature regulation within your vehicle's HVAC system.

  • Single solenoid electronic heater valve for reliable operation
  • Constructed from durable thermoplastic and steel materials
  • Equipped with 3 connectors and 2 terminal pins for secure electrical connections
  • Bypass style valve with precise opening dimensions: 0.64 in (16.18 mm), 0.71 in (18.14 mm), and 0.71 in (18.03 mm)
  • Designed for electric valve operation to integrate seamlessly with vehicle controls

Four Seasons Heater Valve Product Line Details

The Heater Valve product line from Four Seasons focuses on temperature control components that regulate coolant flow within automotive HVAC systems. The 74934 model exemplifies this line by providing an electronically controlled bypass valve that enhances heating efficiency and system responsiveness in compatible vehicles like the Ford C-Max.

Technical Description and Specifications

The Four Seasons Heater Valve 74934 features a robust construction combining thermoplastic and steel to withstand the thermal and mechanical stresses of engine coolant systems. Its electric valve operation uses a single solenoid to modulate coolant flow, improving temperature control accuracy. The valve includes three connectors and two terminal pins, ensuring reliable electrical connectivity. The bypass style design allows coolant to be redirected efficiently, with precise opening sizes of 0.64 inches (16.18 mm), 0.71 inches (18.14 mm), and 0.71 inches (18.03 mm) to match OEM specifications.

Common Applications and Problem Resolution

  • Restores proper heater core coolant flow in Ford C-Max vehicles
  • Resolves inconsistent cabin heating or temperature fluctuations
  • Eliminates heater valve electrical control failures
  • Prevents coolant leaks associated with worn or damaged valves
  • Improves HVAC system responsiveness and comfort

Installation Notes and Tips

When installing the Four Seasons Heater Valve 74934, ensure the vehicle is cooled down to avoid burns from hot coolant. Verify the electrical connectors and terminal pins are clean and secure to maintain proper valve operation. Follow OEM guidelines for removal and replacement to avoid damage to surrounding components. This valve is compatible specifically with Ford C-Max models, so confirm vehicle fitment before installation.

Quality Assurance and Warranty

Four Seasons manufactures the Heater Valve 74934 to meet or exceed OEM standards for durability and performance. The combination of thermoplastic and steel materials ensures long service life under typical operating conditions. While specific warranty details are not provided here, Four Seasons products generally come with a limited warranty covering defects in materials and workmanship.

BrandFour Seasons
Part Number74934
PositionHeater Valve
DescriptionSingle solenoid electronic heater valve
MaterialThermoplastic / steel
Number of Connectors3 connectors
Opening B IN0.71
Opening B MM18.14
Opening C IN0.71
Opening C MM18.03
Opening IN0.64
Opening MM16.18
Operation TypeElectric valve
StyleBypass
Terminal Pin Qty.2
TypeHeater valves

This part fits 6 vehicles. Search below:

YearMakeModelPositionNotes
2018FordC-MaxN/AHeater Valve
2017FordC-MaxN/AHeater Valve
2016FordC-MaxN/AHeater Valve
2015FordC-MaxN/AHeater Valve
2014FordC-MaxN/AHeater Valve
2013FordC-MaxN/AHeater Valve

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

30004374934DM5Z18495AEHV131H78023

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.