The Dometic refrigerant valve with equalizer tube is a critical component in RV air conditioning systems that regulates refrigerant flow and pressure between the compressor and evaporator. If your Dometic AC unit is running inefficiently, cycling on and off frequently, or not cooling properly, a faulty expansion valve is often the culprit. This OEM replacement valve restores proper refrigerant metering and system balance.
Key Features
- Factory-engineered equalizer tube design for precise pressure regulation
- Direct OEM replacement for Dometic RV air conditioning units
- Maintains optimal refrigerant flow under varying load conditions
- Prevents compressor short-cycling and thermal overload
- Brass construction for durability and corrosion resistance
- Compatible with R-134a refrigerant systems
Technical Specifications
| Part Number | 290337289 |
| Manufacturer | Dometic |
| Component Type | Expansion Valve with Equalizer Tube |
| Refrigerant Type | R-134a |
| Material | Brass |
| Condition | New OEM |
Frequently Asked Questions
Q: How do I know if my expansion valve needs replacement?
A: Signs include AC not cooling effectively, compressor cycling rapidly on and off, ice buildup on refrigerant lines, or hissing sounds from the AC unit. A qualified technician can verify valve function using pressure gauges.
Q: Is this valve compatible with my specific RV model?
A: This OEM part fits Dometic air conditioning systems using R-134a refrigerant. We recommend verifying your current part number matches 290337289 or contacting our expert support team with your RV model year and AC unit designation.
Q: Do I need to evacuate the system before installing this valve?
A: Yes. Proper installation requires a certified technician to evacuate the refrigerant charge, replace the valve, and recharge the system with the correct amount of R-134a refrigerant to EPA standards.
Why Choose Elkhart RV Parts
We specialize in hard-to-find Dometic replacement parts for RV owners who demand OEM quality and reliability. Shipping directly from Elkhart, Indiana—the RV capital of the world—we stock genuine Dometic components and provide expert support to help you identify and install the exact part your system needs.
| Brand | Dometic |
|---|---|
| Part_number | 290337289 |
| Product_type | Refrigerant Valve Assembly |
| Key_components | Refrigerant valve, equalizer tube, flare nut |
| Compatible_models | DM2652DM3762 |
| System_type | RV Air Conditioning |
| Part_category | Service/Replacement Part |
| Oem_status | OEM Dometic |
| Installation_type | Ready-to-install |
| Dimensions_inches | {"Length"=>8.3, "Width"=>6.2, "Height"=>4.5} |
| Fit_type | OEM fit |
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.