This Dometic run capacitor is an essential electrical component for air conditioning and refrigeration systems in RVs. If your Dometic AC unit is struggling to start, running inefficiently, or making unusual humming sounds, a failed capacitor is often the culprit. This genuine OEM replacement restores proper motor operation and cooling performance.

Key Features

• 20 microfarad (MFD) capacitance rating for reliable motor starting
• 440-volt rated for high-capacity RV cooling systems
• Genuine Dometic OEM part — exact factory replacement
• Direct fit for Dometic air conditioning and refrigeration units
• Improves AC efficiency and extends compressor lifespan
• Easy installation for experienced RV technicians

Technical Specifications

Specification	Value
Capacitance	20 MFD (microfarads)
Voltage Rating	440V
Part Number	290333597
Type	Run Capacitor
Application	Dometic RV AC and Refrigeration Systems

Frequently Asked Questions

How do I know if my run capacitor has failed?
Common signs include your AC unit humming but not cooling, the compressor not starting, reduced airflow, or the system shutting down unexpectedly. A failed capacitor prevents the motor from reaching full speed.

Can I install this capacitor myself?
While capacitor replacement is straightforward, we recommend having a qualified RV technician handle the installation. Capacitors store electrical charge and must be properly discharged before removal to prevent injury.

Will this fit my Dometic model?
This is a genuine Dometic OEM part designed for systems requiring a 20MFD/440V capacitor. Verify your unit's specifications or contact our expert support team to confirm compatibility with your specific RV model.

Why Elkhart RV Parts

We specialize in hard-to-find Dometic replacement parts and ship directly from Elkhart, Indiana — the RV capital of the world. Every part is genuine OEM Dometic stock backed by expert customer support to help you get your RV systems running smoothly again.