{"product_id":"oem-goodman-piston-kit-for-asz130361aa-heat-pump-b1789868","title":"OEM Goodman Piston Kit for ASZ130361AA Heat Pump — B1789868","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789868 Piston Kit\u003c\/strong\u003e is a genuine OEM refrigerant metering device engineered for the \u003cstrong\u003eASZ130361AA\u003c\/strong\u003e heat pump. The fixed-bore piston (orifice) meters liquid refrigerant into the coil at the precise rate required for rated capacity and efficiency — a mismatched or worn piston causes poor cooling, freeze-ups, and compressor strain.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B1789868\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Model:\u003c\/strong\u003e ASZ130361AA Heat Pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Fixed-orifice piston metering device\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Factory-spec bore diameter — direct OEM replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e R-410A heat pump condenser\/coil\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePiston bore size is model-specific and stamped by the factory. An OEM piston guarantees the exact orifice diameter for correct subcooling and superheat. Generic or approximated pistons can flood or starve the coil, robbing capacity and shortening compressor life. For a 3-ton R-410A system, the correct piston is critical to hitting rated performance.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e Requires opening the refrigerant circuit — recover refrigerant, replace the piston at the distributor\/liquid line, pull a vacuum, and recharge by weight. EPA 608 certification required. Budget 45–60 minutes plus evacuation time. Not a DIY job unless you are refrigerant-certified.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058306826611,"sku":"GOODMAN-16221","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-kit-for-asz130361aa-heat-pump-b1789868","provider":"National HVAC Parts","version":"1.0","type":"link"}