The Dometic expansion valve (TXV) is a critical component in your RV's air conditioning system that regulates refrigerant flow to maintain optimal cooling performance. If your EI1000 unit is running inefficiently, cycling on and off, or not cooling properly, a faulty expansion valve is often the culprit. This OEM replacement part restores precise temperature control and system reliability.
Key Features
- Genuine OEM Dometic part designed for EI1000 air conditioning units
- Thermostatic expansion valve (TXV) regulates refrigerant flow automatically
- Restores proper cooling cycle and system efficiency
- Direct replacement—no modifications required
- Prevents compressor damage from improper refrigerant distribution
- Factory-sealed and ready to install
Technical Specifications
| Specification | Details |
|---|---|
| Part Number | 290336351 |
| Manufacturer | Dometic |
| Component Type | Thermostatic Expansion Valve (TXV) |
| Compatible Unit | Dometic EI1000 |
| Application | RV Air Conditioning System |
| Condition | New OEM |
Frequently Asked Questions
- How do I know if my expansion valve is failing?
- Common signs include inconsistent cooling, the AC unit freezing up or not cooling at all, hissing sounds from the refrigerant lines, or the compressor running continuously without reaching the desired temperature. A professional diagnosis is recommended, but a faulty TXV is a frequent cause of these symptoms.
- Can I install this expansion valve myself?
- While some experienced RV owners can handle the installation, expansion valve replacement typically requires specialized tools for proper refrigerant handling and evacuation. We recommend having a certified technician perform the work to ensure proper installation and system integrity. Improper installation can damage your entire AC system.
- Is this the correct part for my EI1000 unit?
- Yes, this part number 290336351 is the OEM expansion valve designed specifically for Dometic EI1000 air conditioning units. Always verify your unit model before ordering. If you're unsure, contact our expert support team and we can confirm compatibility with your RV's serial number.
Why Elkhart RV Parts
We specialize in hard-to-find Dometic replacement parts that other retailers struggle to stock. Shipping directly from Elkhart, Indiana—the RV capital of the world—we maintain an extensive inventory of genuine OEM components. Every part is authentic Dometic equipment backed by expert support to help you identify and install the exact component your RV needs.
| Brand | Dometic |
|---|---|
| Product type | Thermostatic Expansion Valve (TXV) |
| Part number | 290336351 |
| Alternative part number | 336351 |
| Compatibility | EI1000 series |
| Application | Air conditioning and refrigeration systems |
| Connection type | ODF (Flare) |
| Connection size | 3/8" |
| Valve type | Thermostatic Expansion Valve |
| Part category | Service Parts |
| Oem | true |
| Condition | New |
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.