{"product_id":"oem-lennox-scroll-compressor-20-300-btuh-r-410a-12u78","title":"OEM Lennox Scroll Compressor 20,300 BTUH R-410A — 12U78","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e12U78\u003c\/strong\u003e is an Interlink APA020MAA scroll compressor rated at 20,300 BTUH, built for 380V (max), 3-phase, 20–60 Hz, R-410A Lennox equipment. This compressor pressurizes and moves refrigerant through the system to produce cooling, and its scroll mechanism provides smooth, energy-efficient performance with fewer moving parts than reciprocating units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e loss of cooling while the unit still runs, tripped breakers or blown fuses on startup, excessive noise or vibration, overheating and thermal cutout, or a unit that draws high amperage without building pressure. A grounded winding, open circuit, or seized rotor confirms the compressor needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox specifies exact capacity, voltage, frequency, and oil charge for each application. The factory-matched \u003cstrong\u003e12U78\u003c\/strong\u003e ensures your system reaches rated capacity and efficiency while remaining fully compatible with Lennox controls and R-410A metering. Non-OEM substitutes can cause capacity mismatch, poor oil return, and warranty loss. For a lasting repair, replace the filter drier, verify the charge by subcooling or superheat, and evacuate the system to a deep vacuum before startup.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081118269811,"sku":"LNX-12U78","price":389.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-scroll-compressor-20-300-btuh-r-410a-12u78","provider":"National HVAC Parts","version":"1.0","type":"link"}