{"product_id":"lennox-72w39-run-capacitor","title":"Lennox 72W39 Run Capacitor","description":"\u003cp\u003eUpgrade your condenser service with the \u003cstrong\u003eLennox 72W39 75\/10 MFD 440V Round Dual Run Capacitor\u003c\/strong\u003e, a professional-grade electrical component engineered for high-demand cooling systems. This \u003cstrong\u003e75\/10 MFD 440V run capacitor\u003c\/strong\u003e is the industry-standard direct replacement for legacy part numbers \u003cstrong\u003e100335-51\u003c\/strong\u003e and \u003cstrong\u003e72W3901\u003c\/strong\u003e, ensuring seamless integration into Lennox 14ACX and 14HPX series units. As a \u003cstrong\u003edual run capacitor\u003c\/strong\u003e, it provides dedicated starting and running torque for both the compressor and the condenser fan motor, maintaining the phase shift necessary for optimal motor efficiency.\u003c\/p\u003e\n\n\u003cp\u003eConstructed with a rugged aluminum casing and featuring a \u003cstrong\u003e440V AC rating\u003c\/strong\u003e, this \u003cstrong\u003eHVAC replacement capacitor\u003c\/strong\u003e is built to withstand high internal temperatures and voltage spikes common in residential and commercial environments. The \u003cstrong\u003eround dual run capacitor\u003c\/strong\u003e design allows for a secure fit in standard mounting brackets, while the 10,000 AFC internal protection ensures circuit safety during overpressure conditions. For contractors, utilizing this \u003cstrong\u003eOEM Lennox 72W39\u003c\/strong\u003e part prevents common field failures such as motor overheating or intermittent startup issues, keeping systems within factory \u003cstrong\u003etechnical specifications\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Capacitance:\u003c\/strong\u003e Features a dual 75\/10 microfarad rating to handle the high-load demands of 5-ton cooling systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Voltage Compatibility:\u003c\/strong\u003e Rated at 440VAC, making it a backward-compatible upgrade for older 370V applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandardized Form Factor:\u003c\/strong\u003e The round cylindrical shape ensures compatibility with existing HVAC mounting straps and enclosures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable Motor Support:\u003c\/strong\u003e Specifically tuned to provide consistent current to fan motors and compressors, reducing mechanical wear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does a 75\/10 MFD capacitor do?\u003c\/strong\u003e\u003cbr\u003e\nThis dual-value component supports two separate electrical circuits within your AC unit: the 75 MFD side assists the compressor motor, while the 10 MFD side powers the condenser fan motor.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use a 440V capacitor to replace a 370V?\u003c\/strong\u003e\u003cbr\u003e\nYes, you can always increase the voltage rating of a capacitor (e.g., 440V replacing 370V), as it signifies the maximum voltage the part can handle. Never decrease the voltage rating below the original spec.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I know if my 72W39 capacitor is failing?\u003c\/strong\u003e\u003cbr\u003e\nCommon indicators include a bulging or \"swelled\" top, fluid leaking from the terminals, or a \"humming\" sound from the motor that fails to start the fan or compressor.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: 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.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":1721743015961,"sku":"72W39","price":43.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_060db062-8e89-4d7b-bb20-615c6a59b02a.png?v=1790201020","url":"https:\/\/www.gsistore.com\/en-ca\/products\/lennox-72w39-run-capacitor","provider":"GSIstore","version":"1.0","type":"link"}