Four Seasons 33661 A/C Receiver Drier

Four Seasons 33661 Filter Drier Overview

The Four Seasons 33661 is a steel A/C receiver drier built for HVAC service on select Saab applications. It uses a desiccant-based filter drier design with a sight glass, service port, and switch port to support refrigerant system monitoring and moisture control in the air conditioning circuit.

Compatible with 1990-1991 Saab 9000 filter drier applications, this Four Seasons Filter Drier line part is a direct-fit style replacement for vehicles that use a 3/8 in. male insert O-ring inlet and 3/8 in. female O-ring outlet. The 33661 part number is also listed among common interchange references for the same application.

Key Features

• Brand: Four Seasons Filter Drier
• Part number: 33661
• Steel body construction
• Desiccant included for moisture absorption
• Sight glass included
• Service port and switch port included
• Male insert O-ring inlet and female O-ring outlet
• Meets or exceeds OEM requirements
• New replacement part
• Gaskets/seals included

Detailed Description

The Four Seasons 33661 receiver drier is a steel-bodied HVAC component used in automotive A/C systems to help manage refrigerant moisture and maintain proper system operation. Its 3.000 in. body diameter and 10.000 in. overall length make it a compact receiver drier assembly for select Saab 9000 models. The unit includes a sight glass for visual refrigerant inspection, a service port for system service access, and a switch port for pressure-related connections where equipped.

This part is listed for 1990-1991 Saab 9000, and the 33661 designation appears in interchange references including Bosch 3979 and UAC RD11156C for the same application. If you are replacing a worn or contaminated A/C receiver drier on a Saab 9000, this Four Seasons filter drier provides the correct style of connection and system interface details needed for a proper service replacement.

Common Problems This Part Can Address

• Moisture contamination in the A/C refrigerant circuit
• Reduced cooling performance from a saturated receiver drier
• Visible contamination or restriction in the HVAC system
• Service issues at the A/C line connection points
• Faulty pressure-switch or service-port related replacement needs

Installation Notes and Tips

Verify inlet and outlet connection style before installation: this unit uses a 3/8 in. male insert O-ring inlet and a 3/8 in. female O-ring outlet. Replace the O-rings and seals during service, and evacuate and recharge the A/C system according to factory procedures after installation. Confirm the receiver drier orientation, service port location, and switch port requirements match the original Saab 9000 setup before final assembly.

Quality Assurance

Four Seasons lists this 33661 filter drier as a new part that meets or exceeds OEM requirements. It is built as a steel filter drier with included seals and the specified system features for the listed Saab 9000 applications.