{"product_id":"four-seasons-39644-a-c-expansion-valve","title":"Four Seasons 39644 A\/C Expansion Valve","description":"\u003ch2\u003eFour Seasons 39644 Expansion Valve Overview\u003c\/h2\u003e\u003cp\u003eFour Seasons 39644 is a block-type A\/C expansion valve for R134A systems, built with an aluminum body and O-ring style connections. It is an OE-style replacement that meets or exceeds OEM requirements and is listed for select Nissan and INFINITI applications, including Rogue, Rogue Sport, and QX50 models.\u003c\/p\u003e\u003cp\u003eThis Four Seasons Expansion Valve line focuses on accurate refrigerant metering and service-ready fitment for modern HVAC systems. The 39644 part number is used in applications where stable superheat control and proper liquid-to-suction flow regulation are required.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number 39644 from Four Seasons Expansion Valve\u003c\/li\u003e\n\u003cli\u003eBlock-type A\/C expansion valve for R134A refrigerant\u003c\/li\u003e\n\u003cli\u003eAluminum construction for HVAC service applications\u003c\/li\u003e\n\u003cli\u003eFemale O-ring inlet and outlet fittings\u003c\/li\u003e\n\u003cli\u003eLiquid inlet and outlet: No. 6 and No. 8 thread diameters\u003c\/li\u003e\n\u003cli\u003eSuction inlet and outlet: No. 10 and No. 12 thread diameters\u003c\/li\u003e\n\u003cli\u003eTwo mounting holes\u003c\/li\u003e\n\u003cli\u003e1-tonnage configuration\u003c\/li\u003e\n\u003cli\u003eSuper heat setting: -4.50\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds OEM specifications\u003c\/li\u003e\n\u003cli\u003eWithout solenoid; switch not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eFour Seasons 39644 is an A\/C expansion valve designed to regulate refrigerant flow in R134A HVAC systems. Its block-type design, aluminum housing, and O-ring style connections support service replacement in vehicles that require precise refrigerant metering at the evaporator. The valve is specified with female fittings on both the liquid and suction sides, along with No. 6\/No. 8 liquid thread diameters and No. 10\/No. 12 suction thread diameters for the listed applications.\u003c\/p\u003e\u003cp\u003eCompatible With 2021 Nissan Rogue Sport, 2019-2020 INFINITI QX50, 2020 Nissan Rogue, and 2020 Nissan Rogue Sport. This part cross-references UAC EX10721C for the same application. The Four Seasons 39644 part number is also referenced in interchange listings for select OE and aftermarket service needs.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWeak or inconsistent cabin cooling\u003c\/li\u003e\n\u003cli\u003eImproper refrigerant flow through the evaporator circuit\u003c\/li\u003e\n\u003cli\u003eIncorrect superheat control in the A\/C system\u003c\/li\u003e\n\u003cli\u003eHVAC performance issues caused by a worn expansion valve\u003c\/li\u003e\n\u003cli\u003eService replacement needs on listed Nissan and INFINITI models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the vehicle’s refrigerant type, fitting style, and thread diameters before installation. This valve uses O-ring connections and is specified without a solenoid, so confirm the original system configuration matches the part before service. For the listed fitments, use the exact application notes: Fits 2021 Nissan Rogue Sport, N\/A, To 6\/2020; Expansion Valve. Fits 2019-2020 INFINITI QX50, N\/A, Expansion Valve. Fits 2020 Nissan Rogue, N\/A, Japan Built; Expansion Valve. Fits 2020 Nissan Rogue Sport, N\/A, Expansion Valve.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eFour Seasons lists this expansion valve as meeting or exceeding OEM specifications, making it a direct-fit service part for the confirmed applications. The 39644 designation helps ensure the correct replacement is selected for the specified Nissan Rogue, Rogue Sport, and INFINITI QX50 HVAC systems.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":44599794335925,"sku":"BBRN-39644","price":26.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_39644_Fro.jpg?v=1775068363","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-39644-a-c-expansion-valve","provider":"PartCatalog","version":"1.0","type":"link"}