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Universal Air RD6421C A/C Accumulator
| Brand | Universal Air RD6421C |
|---|---|
| Product line | Accumulator |
| Fits | Buick and Oldsmobile · 15 vehicles |
A/C accumulator. Helps store refrigerant and separate liquid from vapor in the HVAC system.
Universal Air line. Accumulator product line for HVAC service and replacement needs.
Universal Air RD6421C A/C Accumulator
The Universal Air RD6421C is an OE-style A/C accumulator for select GM compact and midsize cars from 1987-1988. It is built for HVAC systems that use an accumulator on the low-pressure side to manage refrigerant flow and moisture control.
Key Features
- Brand: Universal Air Accumulator line
- Part number: RD6421C
- Category: HVAC A/C accumulator / receiver drier
- OE-style replacement for factory accumulator applications
- Fits select Buick Century and Oldsmobile Cutlass models
Detailed Description
Universal Air RD6421C is a direct-fit style A/C accumulator for 1987-1988 Buick Century, 1987-1988 Oldsmobile Cutlass Ciera, and 1987-1988 Oldsmobile Cutlass Cruiser applications. As part of the vehicle air conditioning system, the accumulator helps manage refrigerant flow on the low side and supports moisture control in systems that use an accumulator instead of a receiver drier. The Universal Air Accumulator line focuses on replacement parts for factory HVAC layouts, and RD6421C follows that OE-style approach for these GM platforms.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
Vehicle Fitment
- Fits 1987-1988 Buick Century, N/A
- Fits 1987-1988 Oldsmobile Cutlass Ciera, N/A
- Fits 1987-1988 Oldsmobile Cutlass Cruiser, N/A
Common Issues This Part Addresses
- Moisture buildup in the A/C system
- Restricted refrigerant circulation on accumulator-style HVAC setups
- Reduced cooling performance from a worn accumulator
- Contamination concerns after A/C service or component replacement
Installation Notes and Tips
Confirm the vehicle uses an accumulator-style HVAC layout before ordering. Replace the accumulator when servicing the A/C system after compressor failure or when the original unit shows signs of age, leakage, or contamination. Always evacuate and recharge the system according to factory service procedures.
Quality Assurance
Universal Air’s Accumulator line is positioned as an OE-style replacement range for factory HVAC applications. Verify part number RD6421C against the vehicle’s original A/C configuration before installation.
| Year | Make | Model | Submodel | Liters | Cylinders | Notes |
|---|---|---|---|---|---|---|
| 1988 | Buick | Century | Limited | 3.8L | V6 | OE Style; Accumulator |
| 1988 | Buick | Century | Custom | 3.8L | V6 | OE Style; Accumulator |
| 1988 | Buick | Century | Estate Wagon | 3.8L | V6 | OE Style; Accumulator |
| 1988 | Oldsmobile | Cutlass Ciera | S | 3.8L | V6 | Accumulator |
| 1988 | Oldsmobile | Cutlass Ciera | Base | 3.8L | V6 | Accumulator |
| 1988 | Oldsmobile | Cutlass Ciera | LS | 3.8L | V6 | Accumulator |
| 1988 | Oldsmobile | Cutlass Ciera | SL | 3.8L | V6 | Accumulator |
| 1988 | Oldsmobile | Cutlass Ciera | Brougham | 3.8L | V6 | Accumulator |
| 1988 | Oldsmobile | Cutlass Ciera | International | 3.8L | V6 | Accumulator |
| 1988 | Oldsmobile | Cutlass Cruiser | — | 3.8L | V6 | Accumulator |
| 1987 | Buick | Century | Limited | 3.8L | V6 | OE Style; Accumulator |
| 1987 | Buick | Century | Custom | 3.8L | V6 | OE Style; Accumulator |
| 1987 | Buick | Century | Estate Wagon | 3.8L | V6 | OE Style; Accumulator |
| 1987 | Oldsmobile | Cutlass Ciera | — | 3.8L | V6 | Accumulator |
| 1987 | Oldsmobile | Cutlass Cruiser | — | 3.8L | V6 | Accumulator |
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