Lennox 46W14 Run Capacitor

The Lennox 46W14 Run Capacitor is a high-performance 45/4 MFD 440V dual run capacitor designed for demanding HVACR applications. This round dual run capacitor is an essential component for sustaining the start and run cycles of both the compressor (45 MFD) and the fan motor (4 MFD) in Lennox and compatible Allied, Armstrong, and Ducane systems. Operating at 440 VAC, this unit provides superior voltage stress tolerance compared to 370V alternatives, ensuring stable electrical characteristics in high-heat environments. With a 10,000 AFC safety rating and a non-PCB construction, the Lennox 100335-48 replacement provides the reliability required for AC capacitor replacement in residential and light commercial split systems. Its robust round canister design allows for a direct-fit install in standard HVAC enclosures, maintaining precise microfarad capacitance within a +/- 5% tolerance. Whether you are performing emergency air conditioner repair or preventative maintenance, this dual run capacitor 45/4 440v is the technician's choice for restoring system efficiency and protecting motor longevity.

• Dual-Purpose Reliability: Manages both the compressor and condenser fan motor from a single, space-saving round canister.
• High-Voltage Durability: Rated for 440 VAC to handle power surges and high-ambient temperatures more effectively than lower-rated components.
• OEM Precision: Genuine Lennox 46W14 specifications ensure exact 45+4 microfarad delivery and physical compatibility with existing mounting brackets.
• Enhanced Motor Protection: Stabilizes voltage to the HERM and FAN circuits, reducing heat buildup and extending the service life of expensive system motors.

How do I know if my 45/4 440V capacitor is bad?
Technicians typically look for a "domed" or swollen top, oil leaks, or a system that hums without starting. A multimeter set to capacitance (MFD) will confirm if the Lennox 46W14 has drifted outside its +/- 5% tolerance.

Can I use a 440V capacitor to replace a 370V capacitor?
Yes, a 440V capacitor is a heavy-duty upgrade for a 370V unit. However, the capacitance (45/4 MFD) and physical shape (round) must match the original equipment specifications exactly.

What does the 45/4 MFD rating signify?
The first value (45 MFD) handles the compressor ("HERM" terminal), while the second value (4 MFD) handles the fan motor ("FAN" terminal). Both are critical for the air conditioner not cooling symptoms often found in the field.

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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.