{"product_id":"oem-goodman-refrigerant-piston-kit-for-asz130361ac-b1789868","title":"OEM Goodman Refrigerant Piston Kit for ASZ130361AC — B1789868","description":"\u003ch2\u003eGoodman B1789868 Refrigerant Piston Kit\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eB1789868\u003c\/strong\u003e is the genuine OEM refrigerant metering piston (flowrator) kit for the Goodman \u003cstrong\u003eASZ130361AC\u003c\/strong\u003e heat pump. This precision-machined orifice sits in the liquid line and meters refrigerant into the coil at the exact rate the ASZ130361AC's tonnage and refrigerant charge require. A worn, wrong-sized, or debris-clogged piston causes poor subcooling\/superheat, weak capacity, and compressor stress — making the correct piston essential to system performance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: B1789868\u003c\/li\u003e\n\u003cli\u003eFits: Goodman ASZ130361AC heat pump\u003c\/li\u003e\n\u003cli\u003eType: Fixed-orifice metering piston (flowrator)\u003c\/li\u003e\n\u003cli\u003eBore: Factory-matched orifice for unit tonnage\/charge\u003c\/li\u003e\n\u003cli\u003eIncludes: Piston and O-ring seal\u003c\/li\u003e\n\u003cli\u003eCategory: Metering device \/ piston\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePiston performance lives entirely in the orifice diameter. The genuine Goodman B1789868 carries the precise bore Goodman engineered for the ASZ130361AC, so refrigerant flow, superheat, and subcooling land on-spec. A generic piston with an approximate bore can leave the system over- or under-fed and hurt efficiency. For a few dollars, the OEM piston protects a much more expensive compressor.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAdvanced (5\/5).\u003c\/strong\u003e Replacement requires recovering refrigerant, opening the sealed refrigerant circuit, swapping the piston and O-ring, evacuating, and recharging to spec. This is EPA Section 608 certified work and must be performed by a licensed HVAC technician. Do not open the refrigerant circuit without proper recovery equipment.\u003c\/p\u003e\u003cp\u003eCorrect orifice for the ASZ130361AC. Verify sizing with us at info@nationalhvacparts.com.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058308170099,"sku":"GOODMAN-16233","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-refrigerant-piston-kit-for-asz130361ac-b1789868","provider":"National HVAC Parts","version":"1.0","type":"link"}