Four Seasons 39109 A/C Expansion Valve - Rear

Four Seasons 39109 Rear A/C Expansion Valve

Four Seasons 39109 is a brass TXV A/C expansion valve for R134A systems. It is built for rear HVAC service on the 2004-2009 Cadillac SRX and helps regulate refrigerant flow at the evaporator for stable cooling performance.

Key Features

• Brand: Four Seasons Expansion Valve
• Part number: 39109
• Brass construction
• TXV design for refrigerant metering
• For R134A air conditioning systems
• Rear HVAC application

Product Details

This Four Seasons expansion valve is a direct-fit HVAC flow restrictor for the rear air conditioning circuit on the Cadillac SRX. The TXV design meters refrigerant into the evaporator based on system demand, helping maintain proper cooling balance in the rear A/C system. If you are servicing a 2004-2009 Cadillac SRX rear expansion valve, Four Seasons 39109 is the correct part number to verify against your original component.

This part cross-references UAC EX10212C for the same application.

Common Repair Uses

• Rear A/C vents blowing warm air
• Erratic evaporator refrigerant control
• Restricted refrigerant flow in the rear HVAC circuit
• Expansion valve leakage or internal wear
• Service replacement during rear A/C repair on Cadillac SRX models

Installation Notes

Verify the vehicle uses an R134A system and confirm the rear valve location before installation. Match the original valve style and part number, including Four Seasons 39109, to ensure correct fitment on the 2004-2009 Cadillac SRX. Recover refrigerant and follow proper HVAC service procedures before removing the old valve.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with coverage across air conditioning service components. This expansion valve is specified for the listed Cadillac SRX rear application and uses the stated brass TXV configuration for R134A systems.