Four Seasons 33138 A/C Accumulator

Four Seasons 33138 A/C Accumulator Overview

The Four Seasons 33138 A/C accumulator is a complete aluminum replacement unit for select HVAC systems that use a service port and switch port. It is built to meet or exceed OEM requirements and is listed for 1994 Chevrolet Astro and 1994 GMC Safari applications.

Four Seasons Accumulator parts are built for direct-fit HVAC service, with application-specific inlet and outlet connections that support proper refrigerant flow and moisture control in the air conditioning system. This Four Seasons 33138 accumulator is a practical choice when servicing a 1994 Chevrolet Astro or 1994 GMC Safari A/C system.

Key Features

• Part number 33138 A/C accumulator from Four Seasons
• Complete unit construction in aluminum
• Female O-ring inlet fitting with 3/4 in. inlet diameter
• Male insert O-ring outlet fitting with 3/4 in. outlet fraction
• Includes service port and switch port
• Meets or exceeds OEM specifications
• Body diameter: 3.500 in. / 88.900 mm
• Body length: 9.000 in. / 228.600 mm
• Inlet and outlet thread size: M27x2.000

Detailed Description

The Four Seasons 33138 accumulator is an HVAC A/C accumulator designed for systems that require a complete replacement unit with a service port and switch port. Its aluminum body, OE-style O-ring connections, and OEM-level specification make it a direct service part for 1994 Chevrolet Astro and 1994 GMC Safari models. The 33138 part number is also a useful reference when cross-checking replacement options during A/C repair.

This accumulator uses a female O-ring inlet and a male insert O-ring outlet, with matching M27x2.000 thread sizes for the inlet and outlet. The unit is built to support proper refrigerant system operation after compressor service, leak repair, or accumulator replacement. If you are sourcing a Four Seasons 33138 for a 1994 Chevrolet Astro or 1994 GMC Safari, verify port style and connection dimensions before installation.

This part cross-references UAC RD1638C for the same application.

What It Helps Address

• Moisture buildup in the A/C system
• Restricted refrigerant flow caused by a worn accumulator
• Leaking or damaged accumulator housing
• Service port or switch port replacement needs
• HVAC performance loss after A/C system repair

Installation Notes and Tips

Confirm the vehicle uses the listed accumulator style, inlet and outlet fitting types, and switch port configuration before installation. Replace O-rings with the correct refrigerant-safe seals during service, and inspect mating surfaces for wear or contamination. Proper evacuation and recharge procedures are required after A/C component replacement.

Compatible With 1994 Chevrolet Astro, accumulator; and 1994 GMC Safari, accumulator.

Quality Assurance

Four Seasons lists this accumulator as meeting or exceeding OEM specifications, supporting a direct replacement approach for HVAC service work. The aluminum construction and OE-style fitment details are intended to align with factory system requirements for the listed applications.