{"product_id":"oem-lennox-run-capacitor-15-mfd-440v-oval-19j21","title":"OEM Lennox Run Capacitor 15 MFD 440V Oval — 19J21","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e19J21\u003c\/strong\u003e is a 15 MFD, 440V oval run capacitor (Firstchoice brand) that provides the continuous phase shift needed to keep your compressor or condenser fan motor running efficiently. Installed in outdoor condensing units and heat pumps, it stores and releases electrical energy on every cycle to maintain smooth, torque-stable motor operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e a hard-starting or humming compressor, an outdoor fan that won't spin or spins slowly, warm air from the supply registers, frequent breaker trips, or a capacitor that appears bulged, leaking, or swollen on top. A weak or failed \u003cstrong\u003e19J21\u003c\/strong\u003e forces motors to draw excess current, leading to overheating and premature compressor failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox engineers the 19J21 to exact microfarad tolerance and voltage rating for your system. Aftermarket substitutes with drifting capacitance stress the motor windings and can void equipment warranties. Choosing the factory-specified part ensures rated efficiency, correct fit, and full system compatibility across matching Lennox condenser and heat pump platforms.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081124266355,"sku":"LNX-19J21","price":18.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-capacitor-oval-single-LNX-19J21.jpg?v=1783763420","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-run-capacitor-15-mfd-440v-oval-19j21","provider":"National HVAC Parts","version":"1.0","type":"link"}