Four Seasons 33156 A/C Accumulator

Four Seasons 33156 A/C Accumulator Overview

The Four Seasons 33156 A/C accumulator is a complete aluminum replacement unit for select Cadillac HVAC systems. Built with male insert O-ring inlet and outlet connections, it is made for service on vehicles that use a switch service port and switch port in the accumulator assembly.

Compatible with 1993-2002 Cadillac Eldorado, 1994-1999 Cadillac DeVille, and 1994-1997 Cadillac Seville, this Four Seasons accumulator supports OE-style A/C service on Cadillac Eldorado, DeVille, and Seville applications. The 33156 part number is a direct reference for buyers searching for an A/C accumulator replacement by vehicle and part number.

Key Features

• Four Seasons Accumulator line replacement for automotive A/C systems
• Part number 33156
• Aluminum complete unit construction
• Male insert O-ring inlet and outlet fittings
• Inlet and outlet thread size: M27x2.000
• Body diameter: 3.500 in. / 88.900 mm
• Body length: 8.000 in. / 203.200 mm
• Includes service port and switch port provisions
• Meets or exceeds OEM requirements
• OE-style replacement for Cadillac HVAC service

Product Details

The Four Seasons 33156 accumulator is part of the brand’s Accumulator line, built as a complete unit for A/C system repair. Its aluminum body, OE-style O-ring sealing surfaces, and service-port configuration make it a practical replacement when restoring refrigerant control and moisture management in the HVAC circuit. This part cross-references Gates 21710 and UAC RD1710C for the same application.

Use this accumulator when servicing Cadillac Eldorado, Cadillac DeVille, or Cadillac Seville A/C systems that call for the 33156 configuration. The fitment spans 1993-2002 Cadillac Eldorado, 1994-1999 Cadillac DeVille, and 1994-1997 Cadillac Seville, making it a focused solution for these factory applications.

What This Part Helps Address

• Loss of A/C cooling performance caused by a restricted or worn accumulator
• Refrigerant system service needs on Cadillac Eldorado, DeVille, and Seville models
• Seal leakage at accumulator inlet or outlet connections
• Service-port related HVAC maintenance on the accumulator assembly
• Replacement of a damaged or corroded aluminum accumulator housing

Installation Notes and Tips

Verify the inlet and outlet thread size, fitting style, and switch-port configuration before installation. Replace the O-rings with the correct green O-ring seals during service, and confirm the accumulator matches the vehicle’s A/C layout before evacuating and recharging the system. Mounting hardware is not included.

Quality Assurance

This Four Seasons accumulator is listed as meeting or exceeding OEM requirements for the specified applications. It is built as an OE-style replacement for factory A/C service on compatible Cadillac models.