Lennox 72H72 Start Capacitor

The Lennox 72H72 is a high-performance 189-227 Microfarad 330Vac Round Start Capacitor engineered to provide the high-torque starting assist required for residential and commercial compressors. Designed for 50/60 Hz systems, this genuine OEM Lennox HVAC part replaces the legacy 72H7201 and is essential for overcoming motor friction and mechanical inertia during the initial startup phase. By delivering a precise burst of electrical energy, it ensures the motor reaches full operating speed quickly, reducing heat buildup and protecting internal windings from excessive inrush current.

Encased in a standard round 2.5-inch diameter moisture-resistant can, the Lennox 72H7201 replacement is a drop-in solution for a wide range of Allied, Armstrong, Concord, and Ducane equipment. This AC start capacitor 189-227 MFD is specifically rated at 330V to handle the voltage spikes common in HVACR applications. For contractors, this is a critical truck-stock item for addressing hard-starting compressors and buzzing motors in Lennox air conditioner repair scenarios.

• Universal Compatibility: Direct substitute for 72H7201 across Lennox, Allied, Armstrong, and Ducane brands.
• High Torque Output: Provides the 189-227 MFD boost necessary for heavy-duty compressor startup.
• Industrial Build: Rated for 330Vac to ensure reliable performance under high thermal loads.
• Precise Fit: Standardized round form factor allows for rapid replacement in existing mounting brackets.

How do I know if my Lennox start capacitor is failing?
Common symptoms include a humming sound from the condenser unit without the compressor turning over, "hard starting" where the motor struggles to ramp up, or visible bulging and fluid leakage from the capacitor casing.

Can I use the 72H72 to replace the 72H7201?
Yes, the 72H72 and 72H7201 are technically identical components with the same capacitance and voltage ratings, designed for the same applications.

What is the difference between a start capacitor and a run capacitor?
The 72H72 is a start capacitor designed to stay in the circuit only for the first second of operation to provide starting torque. It must be used in conjunction with a potential relay to drop out of the circuit once the motor reaches speed.

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.