{"product_id":"four-seasons-91591-hvac-heater-core","title":"Four Seasons 91591 HVAC Heater Core","description":"\u003ch2\u003eFour Seasons 91591 Heater Core Overview\u003c\/h2\u003e\u003cp\u003eThe Four Seasons 91591 heater core is a copper\/brass HVAC heater core built for direct replacement service in heating and defrost systems. With a 6 in. core height, 9-3\/4 in. core width, and 2 in. core depth, it is sized for applications that require a compact, OE-style heater core assembly.\u003c\/p\u003e\u003cp\u003eCompatible With select Ford truck and SUV heater core applications, this Four Seasons heater core is a practical replacement for restoring cabin heat and windshield defrost performance. The Four Seasons Heater Core line focuses on replacement parts that meet or exceed OEM requirements, and part number 91591 is built to match the original-style copper\/brass construction used in many older HVAC systems.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number 91591 heater core from Four Seasons\u003c\/li\u003e\n\u003cli\u003eCopper core material with copper\/brass heater core style\u003c\/li\u003e\n\u003cli\u003eCore dimensions: 6 in. height, 9-3\/4 in. width, 2 in. depth\u003c\/li\u003e\n\u003cli\u003eTube sizes: 0.625 in. and 0.750 in.\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds OEM requirements\u003c\/li\u003e\n\u003cli\u003eDirect-fit HVAC heater core replacement for select Ford applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Four Seasons 91591 is a heater core \/ copper brass unit designed for vehicles that use a traditional copper\/brass HVAC core. Its dimensions and tube sizing make it a strong match for restoration and maintenance work where the original heater core has leaked, restricted flow, or lost heat transfer efficiency. If you are searching for a Ford heater core replacement, a truck heater core, or an HVAC heater core for classic Ford applications, part number 91591 is a relevant OE-style option.\u003c\/p\u003e\u003cp\u003eThis part cross-references Gates 6830 for the same application. It also cross-references Nissens 94591 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat This Heater Core Helps Solve\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWeak or inconsistent cabin heat\u003c\/li\u003e\n\u003cli\u003eCoolant seepage from a corroded heater core\u003c\/li\u003e\n\u003cli\u003eFogged windshield caused by poor defrost output\u003c\/li\u003e\n\u003cli\u003eRestricted coolant flow through the HVAC heater circuit\u003c\/li\u003e\n\u003cli\u003eReplacement needs after heater core failure in Ford truck and SUV systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify core height, width, depth, and tube diameters against the original unit before installation. Confirm hose routing and pipe orientation on the vehicle, since adjustable pipe positioning is not included on this part. For best results, inspect the cooling system for contamination or debris before installing the new heater core, and flush the system if the old core failed from corrosion or blockage.\u003c\/p\u003e\u003cp\u003eFits select Ford truck and SUV heater core applications; confirm the original part dimensions and tube sizes match Four Seasons 91591 before ordering. For Ford heater core replacement work, use the vehicle’s HVAC layout and hose connections as the final fitment check.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eFour Seasons lists this heater core as meeting or exceeding OEM requirements. The copper\/brass construction supports OE-style service replacement in applications that originally used this material specification.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":52409498992821,"sku":"BBRN-91591","price":138.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_91591_Ang.jpg?v=1777780418","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-91591-hvac-heater-core","provider":"PartCatalog","version":"1.0","type":"link"}