Four Seasons 39459 A/C Expansion Valve

Four Seasons 39459 Expansion Valve

The Four Seasons 39459 A/C expansion valve is a block-type HVAC flow restrictor built for R134A systems. It is an aluminum OE-style replacement that meets or exceeds OEM requirements and is engineered for direct service on select INFINITI applications, including Q70, Q70L, M35h, M37, and M56 models.

Key Features

• Brand: Four Seasons Expansion Valve
• Part number: 39459
• Block-type A/C expansion valve for R134A refrigerant systems
• Aluminum construction with aluminum finish
• OE-style captured O-ring inlet and outlet connections
• Female suction and liquid fittings with no-thread connection design
• 2.0 tonnage application
• Meets or exceeds OEM specifications
• Style: w/o solenoid

Product Details

Four Seasons 39459 is an A/C expansion valve used to regulate refrigerant flow into the evaporator, helping maintain proper system balance in the HVAC circuit. This block-type valve uses captured O-ring sealing surfaces and female fittings for the suction and liquid ports, with aluminum No. 12 suction connections and No. 6 liquid inlet / No. 10 liquid outlet sizing. The valve is specified with a -6.000 super heat setting and is built for R134A refrigerant service.

This part cross-references UAC EX10449C for the same application. It is a direct-fit service part for 2011-2013 INFINITI M37, 2011-2013 INFINITI M56, 2012-2013 INFINITI M35h, 2014-2019 INFINITI Q70, and 2015-2019 INFINITI Q70L. If you are searching for a Four Seasons 39459 expansion valve for an INFINITI Q70 or M37 HVAC repair, this part matches the listed vehicle coverage.

Common Repair Symptoms

• Weak or inconsistent cabin cooling
• Incorrect evaporator refrigerant metering
• A/C performance loss after compressor or system service
• Temperature fluctuations from the vents
• Restricted refrigerant flow in the HVAC circuit

Installation Notes

Verify refrigerant type, port style, and mounting hole layout before installation. Replace and lubricate O-rings as needed, and confirm the system is clean and properly evacuated before recharging. Because this valve is specified for select INFINITI HVAC systems, confirm year, model, and application details for your vehicle before service. For searches such as 2014-2019 INFINITI Q70 expansion valve or 2011-2013 INFINITI M56 A/C expansion valve, part number 39459 is the referenced OE-style service component.

Quality Assurance

Four Seasons 39459 is built to meet or exceed OEM requirements for the listed applications. Four Seasons is a recognized aftermarket HVAC brand, and this expansion valve is manufactured for service replacement use in compatible INFINITI A/C systems.