Four Seasons 39902 A/C Expansion Valve

Four Seasons 39902 A/C Expansion Valve

The Four Seasons 39902 expansion valve is a block-type A/C flow restrictor built for R134A systems. It uses an aluminum body with sealing-washer connections and a no-solenoid design for direct service replacement in the HVAC circuit.

For technicians and owners searching for an A/C expansion valve for Honda Civic or Toyota Corolla service work, this Four Seasons 39902 part number is a practical OE-style replacement that meets or exceeds OEM requirements.

Key Features

• Brand: Four Seasons Expansion Valve
• Part number: 39902
• Block type A/C expansion valve
• Aluminum construction
• R134A refrigerant type
• Female suction and liquid fittings with sealing washers
• No. 12 suction inlet and outlet thread diameter
• No. 6 liquid inlet thread diameter and No. 8 liquid outlet thread diameter
• 2 mounting holes
• Super heat setting: -4.0
• Meets or exceeds OEM specifications
• Style: without solenoid

Product Details

The Four Seasons 39902 expansion valve regulates refrigerant flow through the evaporator circuit to maintain proper A/C performance in R134A-equipped systems. Its block-style layout, female threaded ports, and sealing-washer design support a secure service fit where the original valve uses the same connection style. This part number 39902 is a direct-fit service component for HVAC repairs that require accurate refrigerant metering and stable system operation.

This part cross-references SKF 1691 for the same application.

What It Helps Fix

• Weak or inconsistent cabin cooling
• Incorrect refrigerant metering at the evaporator
• A/C performance loss caused by a worn expansion valve
• Temperature swings from a sticking block-type valve
• Service replacement needs on R134A HVAC systems

Installation Notes

Verify the original valve style, port sizes, and refrigerant type before installation. Confirm the suction and liquid thread diameters match the vehicle’s HVAC connections, and replace sealing washers as required during service. Proper evacuation and recharge procedures are necessary after A/C component replacement. For Honda Civic and Toyota Corolla applications, compare the original block valve layout and mounting-hole pattern to ensure correct fitment.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements, making it a service-grade replacement for HVAC repair work. The aluminum construction and OE-style connection layout support consistent fitment in applications that call for the Four Seasons 39902 valve.