{"product_id":"four-seasons-74940-hvac-heater-control-valve","title":"Four Seasons 74940 HVAC Heater Control Valve","description":"\u003ch2\u003eOverview of Four Seasons Heater Valve 74940\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Heater Valve 74940 is a rotary electronic heater valve designed for precise temperature control in your vehicle's HVAC system. Engineered with durable plastic and featuring four connectors, this electric bypass valve is compatible with select Mercedes-Benz models, ensuring reliable operation and efficient heating performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRotary electronic heater valve design for accurate temperature regulation\u003c\/li\u003e\n\u003cli\u003eConstructed from durable plastic material\u003c\/li\u003e\n\u003cli\u003eEquipped with 4 connectors for secure electrical connections\u003c\/li\u003e\n\u003cli\u003eBypass style electric valve for controlled coolant flow\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple Mercedes-Benz models including CLS55 AMG and E350\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Heater Valve 74940 belongs to the Heater Valve product line, which focuses on providing reliable HVAC heater control valves for automotive temperature management. This particular valve operates electrically, using a rotary mechanism to regulate coolant flow through the heater core. The bypass style design allows for efficient temperature control by diverting coolant as needed. The valve openings measure approximately 0.73 to 0.78 inches (18.54 mm), ensuring compatibility with the vehicle's existing HVAC plumbing. Its plastic construction balances durability with resistance to corrosion and heat exposure.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis HVAC heater control valve is specifically compatible with a range of Mercedes-Benz models, including CLS55 AMG, CLS500, E55 AMG, E63 AMG, E320, E350, E500, and E550. The Four Seasons 74940 heater valve is ideal for owners seeking a direct replacement part to maintain or restore proper heating function in these vehicles.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRestores proper heater core coolant flow\u003c\/li\u003e\n\u003cli\u003eResolves inconsistent cabin heating issues\u003c\/li\u003e\n\u003cli\u003eEliminates heater valve electrical malfunctions\u003c\/li\u003e\n\u003cli\u003ePrevents coolant leaks in the HVAC system\u003c\/li\u003e\n\u003cli\u003eImproves overall HVAC temperature control responsiveness\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Four Seasons Heater Valve 74940, ensure the vehicle is cooled down to avoid burns from hot coolant. Verify the four electrical connectors are securely attached to prevent operational faults. Confirm the valve orientation matches the original part to maintain proper coolant flow direction. It is recommended to inspect surrounding hoses and connections for wear or damage during replacement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eFour Seasons manufactures the Heater Valve 74940 to meet or exceed OEM specifications for fit, form, and function. The plastic construction and electric operation are designed for durability under typical automotive conditions. While specific warranty details are not provided here, Four Seasons products generally come with a limited warranty covering defects in materials and workmanship.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":52118507421877,"sku":"BBRN-74940","price":78.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_74940_Fro.jpg?v=1775161824","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-74940-hvac-heater-control-valve","provider":"PartCatalog","version":"1.0","type":"link"}