Four Seasons 38891 A/C Expansion Valve - Rear

Four Seasons 38891 Expansion Valve for Rear A/C Service

Four Seasons 38891 is a brass TXV A/C expansion valve for R134A systems. It regulates refrigerant flow into the evaporator to help maintain stable cooling performance in rear HVAC applications.

Key Features

• Brand: Four Seasons Expansion Valve line
• Part number: 38891
• Brass construction
• TXV design for refrigerant metering
• Built for R134A refrigerant systems
• Rear HVAC application

Application Details

This Four Seasons expansion valve is used in rear air conditioning systems on select GM vans and minivans. It fits 1994-1996 Chevrolet Lumina APV, rear; 1995-1996 Chevrolet Lumina Van, rear; 1994-1996 Oldsmobile Silhouette, rear; and 1994-1996 Pontiac Trans Sport, rear. If you are sourcing a Four Seasons 38891 replacement for a rear A/C repair, verify the vehicle’s refrigerant system and valve style before installation.

This part cross-references UAC EX7414PC and EX10429C for the same application.

What This Part Helps Address

• Weak or inconsistent rear A/C cooling
• Improper refrigerant metering at the evaporator
• Temperature fluctuations in the rear HVAC circuit
• Expansion valve restriction or wear-related performance loss
• Service replacement for R134A rear air conditioning systems

Installation Notes and Tips

Confirm the vehicle uses an R134A system and a TXV-style rear expansion valve before ordering. Inspect the surrounding A/C components, seals, and refrigerant lines during service, and evacuate and recharge the system according to proper HVAC procedures after installation. For fitment verification, match the application to the exact model, year, and rear position listed above.

Quality Assurance

Four Seasons supplies HVAC service parts for automotive air conditioning repairs, and this expansion valve is built to meet the requirements of the listed rear applications.