Lennox 10W37 Dual Capacitor

As a seasoned technician, you know that a failed capacitor is one of the most common causes of system downtime. The Lennox 10W37 Dual Capacitor is a high-performance 80/7.5 MFD 440V component specifically designed to handle the load of both the compressor and the condenser fan motor. Built to OEM specifications, this round dual run capacitor replaces the 10W3701 and older part numbers like 69M70, X3244, and 100335-33. Rated for 440 VAC, it offers superior dielectric strength and heat dissipation compared to 370V alternatives, ensuring stable phase-shift and motor torque under heavy summer loads. With a +/- 5% tolerance and 10,000 AFC safety protection, this 80+7.5 MFD unit is the professional choice for maintaining high SEER ratings and preventing locked rotor starts in Lennox, Armstrong, and Ducane equipment. Ensure your multi-meter confirms these microfarad values during your next PM to prevent premature motor winding failure.

• Dual-Section Design: Integrates an 80 MFD compressor circuit and a 7.5 MFD fan circuit into one round dual run capacitor.
• High Voltage Duty: 440V rating provides a robust safety margin against voltage spikes and back-EMF from the compressor.
• Broad Compatibility: Direct replacement for Lennox 10W3701, 69M7001, and X324401 across multiple residential platforms.
• Safety Rated: Features internal pressure sensitive interrupters (AFC 10,000) and is UL recognized for reliable field performance.
• Heavy-Duty Build: Non-PCB oil-filled construction ensures optimal thermal stability in high-ambient condenser environments.

Can I use a 440V capacitor if the old one was 370V?
Yes. You can always uprate the voltage. A 440V capacitor is more durable and handles heat better than a 370V unit, provided the MFD ratings match exactly.

What are the signs of a failing Lennox 10W37?
Look for a "mushroomed" or bulging top, oil leaks around the terminals, or a humming compressor that fails to turn over. Always verify with a capacitance test from Herm to Common and Fan to Common.

What does the 80/7.5 MFD rating mean for my system?
The 80 MFD side provides the necessary phase shift for the compressor, while the 7.5 MFD side supports the condenser fan motor. Using the wrong capacitance can lead to overheating and eventual motor failure.

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.