{"product_id":"four-seasons-74671-hvac-heater-control-valve","title":"Four Seasons 74671 HVAC Heater Control Valve","description":"\u003ch2\u003eReliable HVAC Heater Control Valve for Audi and Ford Vehicles\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Heater Valve 74671 is designed to provide precise temperature control for select Audi, Ford, Lincoln, and Mercury models. This vacuum-operated, non-bypass heater valve ensures efficient heating system performance by regulating coolant flow accurately.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVacuum closes non-bypass heater valve design\u003c\/li\u003e\n\u003cli\u003eConstructed from durable thermoplastic and steel materials\u003c\/li\u003e\n\u003cli\u003eIncludes 2 hose connectors with 0.750 inch (19.05 mm) openings\u003c\/li\u003e\n\u003cli\u003eO.E. replacement part for direct fit and function\u003c\/li\u003e\n\u003cli\u003eCompatible with multiple Audi Quattro and Ford models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFour Seasons Heater Valve Product Line Overview\u003c\/h2\u003e\u003cp\u003eThe Heater Valve line from Four Seasons focuses on HVAC temperature control components engineered for reliable operation and compatibility with original equipment specifications. The 74671 heater valve exemplifies this line by offering a vacuum-operated, non-bypass design that integrates seamlessly with factory systems to maintain proper cabin heating performance.\u003c\/p\u003e\u003ch2\u003eDetailed Product Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis HVAC heater control valve features a vacuum operation type that closes the valve to regulate coolant flow through the heater core. The non-bypass style ensures that coolant is directed properly without recirculation, optimizing heating efficiency. Made from thermoplastic and steel, the valve is built to withstand typical engine bay conditions. The part includes two hose connectors, each with a 0.750 inch (19.05 mm) opening, matching original equipment dimensions for straightforward installation. As an O.E. replacement, the Four Seasons 74671 heater valve meets factory standards for fit and function.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Common Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Audi models including 80, 80 Quattro, 90, 90 Quattro, 100, 100 Quattro, 200, 200 Quattro, 5000 Quattro, A6, A6 Quattro, S4, S6, and V8 Quattro\u003c\/li\u003e\n\u003cli\u003eFits Ford models such as Bobcat, Escort, Lynx, Pinto, Thunderbird, and Cougar\u003c\/li\u003e\n\u003cli\u003eAlso compatible with Lincoln Mark VI, Continental, and Versailles\u003c\/li\u003e\n\u003cli\u003eDesigned for vehicles requiring a vacuum-operated, non-bypass heater valve\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by This Heater Valve\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eInconsistent cabin heating due to faulty valve operation\u003c\/li\u003e\n\u003cli\u003eCoolant leaks from worn or damaged heater valve components\u003c\/li\u003e\n\u003cli\u003eFailure to regulate coolant flow causing overheating or insufficient heat\u003c\/li\u003e\n\u003cli\u003eVacuum leaks affecting heater valve closing function\u003c\/li\u003e\n\u003cli\u003eReplacement of original heater valve to restore HVAC system performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure vacuum lines are properly connected to maintain valve operation\u003c\/li\u003e\n\u003cli\u003eVerify hose connector sizes match existing heater hoses (0.750 inch openings)\u003c\/li\u003e\n\u003cli\u003eInspect surrounding components for wear or damage during installation\u003c\/li\u003e\n\u003cli\u003eFollow vehicle-specific service manual instructions for heater valve replacement\u003c\/li\u003e\n\u003cli\u003eTest HVAC system after installation to confirm proper heating function\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Heater Valve 74671 is manufactured to meet or exceed original equipment standards, ensuring reliable performance and durability. This part is an exact O.E. replacement, providing confidence in fit and function. Warranty coverage details are provided by Four Seasons and typically cover defects in material and workmanship under normal use.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":44611029729461,"sku":"BBRN-74671","price":36.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_74671_Fro.jpg?v=1775070019","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-74671-hvac-heater-control-valve","provider":"PartCatalog","version":"1.0","type":"link"}