Four Seasons 38806 A/C Expansion Valve - Rear

Four Seasons 38806 A/C Expansion Valve

The Four Seasons Expansion Valve, part number 38806, is a brass TXV for R134A air conditioning systems. It regulates refrigerant flow at the evaporator to help maintain stable cooling performance in the rear HVAC circuit.

Key Features

• Brass construction for HVAC service applications
• TXV design for controlled refrigerant metering
• Configured for R134A refrigerant systems
• Rear A/C expansion valve application
• Four Seasons Expansion Valve line

Product Details

Four Seasons 38806 is an A/C expansion valve built for rear HVAC use in select GM minivan applications. It is listed for 1991-1993 Chevrolet Astro rear, 1992-1993 Chevrolet Lumina APV rear with valve, 1991-1993 GMC Safari rear, 1992-1993 Oldsmobile Silhouette rear, and 1992-1993 Pontiac Trans Sport rear. This TXV helps meter refrigerant into the evaporator based on system demand, supporting proper cooling control in R134A-equipped systems. This part cross-references UAC (e.g., EX10105C, EX10106C) for the same application.

Common Repair Uses

• Rear A/C outlet temperature that is too warm
• Erratic evaporator refrigerant control
• Restricted or uneven refrigerant flow at the rear HVAC circuit
• Service replacement for a leaking or sticking expansion valve
• Restoring cooling performance in Chevrolet Astro, GMC Safari, and related GM vans

Installation Notes

Verify the vehicle uses an R134A system and confirm rear HVAC configuration before installation. Inspect the surrounding A/C components, seals, and lines for contamination or damage that could affect valve performance. Match the valve type and port layout to the original part number 38806 application.

Quality Assurance

Four Seasons is a recognized HVAC parts brand with a broad aftermarket catalog for climate control service. Part number 38806 is listed with brass construction and TXV operation for the specified rear A/C applications.