The Dometic 290331984 AC Accumulator is a critical refrigerant system component designed for 4-ton Dometic DM Series rooftop air conditioners. This accumulator prevents liquid refrigerant from entering the compressor, protecting your AC system from damage while ensuring optimal cooling performance. If your RV air conditioner is experiencing reduced cooling capacity, compressor noise, or refrigerant system issues, this OEM accumulator may be the replacement part you need.
Key Features
- 4-Ton Capacity: Engineered specifically for high-capacity Dometic DM Series commercial-grade RV air conditioning systems
- Compressor Protection: Separates liquid refrigerant from vapor to prevent liquid slugging and compressor damage
- OEM Quality Construction: Genuine Dometic replacement part built to original equipment specifications
- Refrigerant System Component: Essential part of the AC refrigeration cycle that ensures proper system operation
- Direct Fit Replacement: Designed to fit DM Series units without modification
Technical Specifications
| Part Number | 290331984 |
| Capacity | 4-Ton |
| Compatible Series | Dometic DM Series |
| Component Type | AC Accumulator (Refrigerant System) |
| Application | Rooftop RV Air Conditioner |
Compatible Models
| Series | Description |
| DM Series | 4-Ton Dometic Commercial RV Air Conditioners |
Frequently Asked Questions
The accumulator acts as a reservoir that separates liquid refrigerant from refrigerant vapor before it reaches the compressor. This prevents liquid refrigerant from entering the compressor, which could cause severe damage. It also stores excess refrigerant and oil, ensuring smooth system operation during varying load conditions.
Common signs include reduced cooling capacity, frost buildup on refrigerant lines, unusual compressor noises, or if your AC technician has identified refrigerant system contamination. Accumulators should also be replaced whenever the compressor is replaced or if the system has been opened for extended periods.
Accumulator replacement requires recovering refrigerant, brazing or soldering refrigerant lines, evacuating the system, and recharging with the correct amount of refrigerant. This work requires EPA certification and specialized HVAC tools. We recommend having a certified RV AC technician perform this installation.
Yes, this accumulator is engineered specifically for 4-ton capacity Dometic DM Series air conditioners. Using the wrong capacity accumulator can result in improper refrigerant flow, reduced cooling performance, and potential compressor damage. Always verify your AC unit's tonnage before ordering.
Why Choose Elkhart RV Parts?
At ElkhartRVParts.com, we specialize in hard-to-find Dometic RV air conditioning components like this 4-ton accumulator. Located in Elkhart, Indiana — the RV Capital of the World — we understand the unique needs of RV owners and technicians. We stock genuine OEM Dometic parts that meet original equipment specifications, ensuring proper fit and reliable performance. Our expert support team can help you identify the correct part for your specific DM Series air conditioner, and we offer fast shipping to get your RV cooling system back in operation quickly.
| Brand | Dometic |
|---|---|
| Product_type | AC Accumulator |
| Capacity_tons | 4 |
| Part_number | 290331984 |
| Compatible_models | DM2650DM3650 |
| Series | DM Series |
| Dimensions_height_inches | 12.3 |
| Dimensions_width_inches | 12.3 |
| Dimensions_depth_inches | 4.7 |
| Oem_part | true |
| Installation_type | Direct replacement |
| Modifications_required | false |
| Function | Prevents liquid refrigerant from entering suction line |
| Application | RV air conditioning systems |
| Part_category | Service part |
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.