York 31-03002-004 Run Capacitor

For service calls involving failing York condenser fan motors or blower assemblies, the York 31-03002-004 Run Capacitor is the specific OEM replacement part required to restore factory-spec electrical performance. This 15 MFD 370V oval run capacitor is engineered to provide the precise phase shift necessary for permanent split capacitor (PSC) motors, ensuring the start winding receives the correct torque and current flow. Maintaining an accurate 15 microfarad (uF) capacitance is critical; under-capacitance often leads to motor overheating and nuisance tripping, while exceeding the rating can cause excessive winding current and premature motor failure.

The 370 VAC rating provides the necessary dielectric strength to handle back-EMF generated by the motor during continuous operation. Built with a durable oval aluminum housing, this genuine York HVAC part fits the standard mounting brackets found in York, Luxaire, and Coleman equipment. Utilizing an HVAC motor run capacitor that matches the original manufacturer’s specifications ensures optimal energy efficiency and system reliability under high-ambient conditions. For technicians, this is a direct drop-in component that eliminates the mounting geometry issues common with generic round replacements.

Key Benefits for Technicians

• Direct OEM Compatibility: Ensures the motor operates within its designed power factor, protecting the windings from heat damage.
• High-Grade Dielectric Material: Rated for 370V to withstand voltage spikes and continuous duty cycles in residential and light commercial units.
• Compact Oval Form Factor: Fits securely into tight control compartments where standard round capacitors may interfere with wiring or panels.
• Optimized Motor Torque: Provides the consistent electrical "push" required for efficient start-up and smooth running of fan and blower motors.

Common Technical Questions

Can I use a 440V capacitor to replace this 370V 31-03002-004 model?
Yes. You can always increase the voltage rating of a capacitor as it represents the maximum insulation breakdown limit. However, you must maintain the exact 15 MFD capacitance to ensure the motor operates at its rated amperage.

How do I know if this run capacitor is failing?
Technicians should look for physical signs such as a bulged top or oil leaks. On a multimeter, if the microfarad reading deviates more than +/- 5% to 6% from the 15 MFD rating, the part should be replaced to prevent motor damage.

Is this capacitor used for the compressor or the fan motor?
A 15 MFD rating is most commonly associated with smaller condenser fan motors or indoor blower motors. Always check the motor nameplate to confirm the required capacitance before installation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.