{"product_id":"oem-lennox-tecumseh-avb5549exn-compressor-49k-btu-r-22-74h12","title":"OEM Lennox Tecumseh AVB5549EXN Compressor 49K BTU R-22 — 74H12","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e74H12\u003c\/strong\u003e is a Tecumseh AVB5549EXN reciprocating compressor rated at 49,000 BTUH, 208\/230V, R-22, single-phase. This piston-driven compressor pressurizes and circulates refrigerant through your Lennox condensing unit, driving the cooling cycle. It is built to Lennox factory specifications and drops into compatible R-22 systems for restored capacity and dependable operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A worn reciprocating compressor typically causes a system that runs but fails to cool, breakers tripping on startup, knocking or clattering from the outdoor unit, hard starts and short-cycling, or a compressor that hums and trips on overload without starting. Shorted or grounded windings and excessive amp draw confirm replacement is needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e R-22 systems require a compressor matched to the correct refrigerant, voltage, and capacity. The Lennox \u003cstrong\u003e74H12\u003c\/strong\u003e is the factory-authorized Tecumseh unit, ensuring proper oil charge, displacement, and electrical characteristics for rated efficiency and long service life. Aftermarket substitutes risk mismatched performance and premature failure — install the correct OEM compressor for a reliable, lasting repair.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081119023475,"sku":"LNX-74H12","price":389.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-tecumseh-avb5549exn-compressor-49k-btu-r-22-74h12","provider":"National HVAC Parts","version":"1.0","type":"link"}