{"product_id":"standard-ignition-ax221-hvac-heater-core-temperature-sensor","title":"Standard Ignition AX221 HVAC Heater Core Temperature Sensor","description":"\u003ch2\u003eHVAC Heater Core Temperature Sensor Overview\u003c\/h2\u003e\u003cp\u003eStandard Ignition AX221 is a direct-fit HVAC heater core temperature sensor built for straightforward replacement on select Ford, Lincoln, and Mercury vehicles. It uses a female plug-in connector with 2 male blade terminals to match the original electrical connection and help restore accurate temperature sensing in the heater core circuit.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect-fit OE replacement for the heater core temperature sensor\u003c\/li\u003e\n\u003cli\u003eFemale connector with plug-in design\u003c\/li\u003e\n\u003cli\u003e2 male blade terminals for the specified application\u003c\/li\u003e\n\u003cli\u003eBuilt with materials intended to handle demanding underhood conditions\u003c\/li\u003e\n\u003cli\u003eIndividually tested for reliability during manufacturing\u003c\/li\u003e\n\u003cli\u003eStandard Ignition AX221 for HVAC sensor replacement needs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eStandard Ignition AX221 is an HVAC heater core temperature sensor designed for vehicles that require a white, 2-blade terminal style sensor in the heater core temperature circuit. It is a direct replacement part for service work on applications such as the Ford Escape, Mercury Mariner, Ford Taurus, Ford Expedition, Lincoln Navigator, and related models. The OE-style fit helps simplify installation while maintaining the original connector and terminal layout. Standard Ignition AX221 is manufactured under controlled quality processes to support consistent performance across the listed applications.\u003c\/p\u003e\u003cp\u003eThis part cross-references Dayco 70020 for the same application.\u003c\/p\u003e\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 2007-2014 Lincoln Navigator, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2005-2012 Ford Escape, N\/A; White; 2 Blade Term.\u003c\/li\u003e\n\u003cli\u003eFits 2005-2011 Mercury Mariner, N\/A; White; 2 Blade Term.\u003c\/li\u003e\n\u003cli\u003eFits 2007-2009 Ford Expedition, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2002-2009 Ford Taurus, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2008-2009 Ford Taurus X, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2008-2009 Mercury Sable, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2002-2005 Mercury Sable, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2005-2007 Ford Five Hundred, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2005-2007 Mercury Montego, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2005-2006 Ford Escape, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2006 Mercury Mariner, N\/A\u003c\/li\u003e\n\u003cli\u003eFits 2002-2005 Ford Thunderbird, N\/A\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues This Sensor May Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIncorrect heater core temperature readings\u003c\/li\u003e\n\u003cli\u003eHVAC temperature control concerns tied to sensor failure\u003c\/li\u003e\n\u003cli\u003eIntermittent sensor signal from worn terminals or connector damage\u003c\/li\u003e\n\u003cli\u003eReplacement needs after corrosion or heat-related electrical wear\u003c\/li\u003e\n\u003cli\u003eService repair for a failed original heater core temperature sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the connector style, terminal count, and vehicle application before installation. This sensor uses a female plug-in connector with 2 male blade terminals, so matching the original harness connection is important for proper fitment. Confirm the vehicle year and model against the listed applications for Ford Escape, Mercury Mariner, Ford Taurus, and other supported vehicles before replacing the part.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eStandard Ignition manufactures this sensor with quality control maintained throughout the production process. The part is built from high-quality materials and undergoes extensive testing to support dependable operation in automotive HVAC service.\u003c\/p\u003e","brand":"Standard Ignition","offers":[{"title":"Default Title","offer_id":52401893540021,"sku":"FBHK-AX221","price":32.89,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SI_AX221_Fro.jpg?v=1777761339","url":"https:\/\/www.partcatalog.com\/products\/standard-ignition-ax221-hvac-heater-core-temperature-sensor","provider":"PartCatalog","version":"1.0","type":"link"}