{"product_id":"oem-lennox-copeland-compressor-11a74","title":"OEM Lennox Copeland Compressor — 11A74","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e11A74\u003c\/strong\u003e is a Copeland compressor engineered to serve as the heart of your Lennox condensing unit or heat pump. The compressor circulates and pressurizes refrigerant throughout the system, driving the entire cooling — and, in heat pump models, heating — cycle. Built to Lennox factory specifications, this Copeland unit delivers the correct displacement, electrical characteristics, and mounting fit for a true drop-in replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing compressor often shows up as a system that runs but won't cool, hard-starting or repeated tripping of the breaker, loud humming or buzzing without startup, grinding or knocking noises, or a compressor that trips on its internal overload and shuts down. Electrical shorts to ground and locked-rotor conditions are also frequent end-of-life indicators.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox systems are matched at the factory for specific compressor tonnage, refrigerant type, and electrical draw. Installing the correct OEM \u003cstrong\u003e11A74\u003c\/strong\u003e ensures rated capacity, proper oil charge compatibility, and protection of your warranty — while off-spec substitutes risk poor efficiency, premature failure, and damage to surrounding components. Insist on the genuine Lennox part to restore full, reliable performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081136324979,"sku":"LNX-11A74","price":389.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-copeland-compressor-11a74","provider":"National HVAC Parts","version":"1.0","type":"link"}