{"product_id":"four-seasons-39439-a-c-expansion-valve","title":"Four Seasons 39439 A\/C Expansion Valve - Front","description":"\u003ch2\u003eFour Seasons 39439 Expansion Valve\u003c\/h2\u003e\u003cp\u003eFour Seasons 39439 is a block-type A\/C expansion valve for R134A systems, built from aluminum for front HVAC service. It is listed for 2011-2012 INFINITI QX56 front applications and meets or exceeds OEM requirements for direct replacement use.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrand: Four Seasons Expansion Valve line\u003c\/li\u003e\n\u003cli\u003ePart number: 39439\u003c\/li\u003e\n\u003cli\u003eBlock-type A\/C expansion valve for R134A refrigerant\u003c\/li\u003e\n\u003cli\u003eAluminum construction with aluminum finish\u003c\/li\u003e\n\u003cli\u003eFront position fitment for 2011-2012 INFINITI QX56\u003c\/li\u003e\n\u003cli\u003eFemale O-ring suction and liquid connections\u003c\/li\u003e\n\u003cli\u003eCaptured O-ring and female insert O-ring styles for the listed ports\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds OEM specifications\u003c\/li\u003e\n\u003cli\u003eDesigned for 1.5 tonnage systems with 5.5 superheat\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eThe Four Seasons Expansion Valve product line focuses on OE-style HVAC flow control for automotive air conditioning systems. Part number 39439 uses a block-type layout with aluminum body construction and R134A refrigerant compatibility. Connection details include No. 12 suction inlet and outlet thread diameters, No. 6 liquid inlet, and No. 8 liquid outlet, with female O-ring fittings and non-threaded interfaces where specified. This part cross-references Global Parts Distributors LLC 3411543 for the same application.\u003c\/p\u003e\u003cp\u003eFor front A\/C service on the 2011-2012 INFINITI QX56, this expansion valve helps regulate refrigerant flow across the evaporator circuit. The listed fitment and OE-level specification make Four Seasons 39439 a direct-reference choice when replacing a worn or restricted valve in the HVAC system.\u003c\/p\u003e\u003ch2\u003eCommon Issues This Part Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eInconsistent cabin cooling from improper refrigerant metering\u003c\/li\u003e\n\u003cli\u003eFront A\/C performance loss caused by a restricted expansion valve\u003c\/li\u003e\n\u003cli\u003eEvaporator temperature control problems in R134A systems\u003c\/li\u003e\n\u003cli\u003eHVAC pressure imbalance related to valve wear or contamination\u003c\/li\u003e\n\u003cli\u003eService replacement needs on 2011-2012 INFINITI QX56 front air conditioning systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify refrigerant type, port style, and line sizes before installation. Replace the valve only after the system has been properly evacuated and inspected for contamination, leaks, and compressor debris. Use the listed O-ring sealing points and confirm correct orientation during assembly on the front HVAC circuit of the INFINITI QX56. After installation, evacuate and recharge the system to the vehicle specification and confirm vent temperature and operating pressures.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eFour Seasons 39439 is specified as meeting or exceeding OEM requirements for the listed application. It is built as an OE-style replacement expansion valve for service work on 2011-2012 INFINITI QX56 front HVAC systems.\u003c\/p\u003e","brand":"Four Seasons","offers":[{"title":"Default Title","offer_id":44599730340021,"sku":"BBRN-39439","price":32.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/FS_39439_Fro.jpg?v=1775068302","url":"https:\/\/www.partcatalog.com\/products\/four-seasons-39439-a-c-expansion-valve","provider":"PartCatalog","version":"1.0","type":"link"}