Four Seasons 39419 A/C Expansion Valve

Four Seasons 39419 Expansion Valve Overview

Four Seasons 39419 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and sealing-washer connections for the liquid and suction lines. It is specified for 1.5 ton applications with a 2.5 super heat setting and meets or exceeds OEM requirements.

Use this Four Seasons Expansion Valve when servicing an automotive HVAC system that needs precise refrigerant metering and stable evaporator performance. The 39419 part number is a direct reference for technicians searching for an OE-style A/C expansion valve for Honda Civic and similar vehicle applications.

Key Features

• Brand: Four Seasons Expansion Valve
• Part number: 39419
• Block-type A/C expansion valve for R134A refrigerant
• Aluminum construction with gold finish
• Liquid and suction ports use sealing-washer style connections
• Female inlet and outlet fittings
• 2 mounting holes
• Super heat setting: 2.5
• 1.5 ton rating
• Meets or exceeds OEM specifications
• Style: without solenoid

Detailed Description

The Four Seasons 39419 expansion valve regulates refrigerant flow into the evaporator so the HVAC system can maintain proper cooling performance. Its block-type design, No. 6 liquid inlet, No. 8 liquid outlet, and No. 10 suction connections support service work on R134A air conditioning systems that require sealing-washer fittings. This part number 39419 is a practical replacement choice for technicians looking for a direct-fit A/C expansion valve for Honda Civic HVAC repair and other listed interchange applications.

This part cross-references Global Parts Distributors LLC 1812011 and Frenkit S20458 for the same application.

What It Helps Address

• Weak cabin cooling caused by incorrect refrigerant metering
• Evaporator performance issues tied to a worn expansion valve
• HVAC temperature swings during A/C operation
• Service replacement needs for R134A block-type systems
• Leak-prone or damaged sealing-washer valve connections

Installation Notes and Tips

Verify the system uses R134A refrigerant and a block-type expansion valve before installation. Match the liquid and suction fitting sizes, thread diameters, and sealing-washer style connections to the original component, and confirm the 2-mounting-hole layout and without-solenoid configuration. For Honda Civic A/C service, compare the original valve to part number 39419 before reassembly and evacuation.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements. The 39419 part number is supported by multiple interchange references, which helps confirm application matching during HVAC repair and replacement.