{"product_id":"oem-goodman-piston-kit-for-asz130241ae-heat-pump-b1789857","title":"OEM Goodman Piston Kit for ASZ130241AE Heat Pump — B1789857","description":"\u003ch2\u003eOEM Goodman B1789857 Piston Kit\u003c\/h2\u003e\u003cp\u003eThe B1789857 piston (flow-control\/metering orifice) sets the refrigerant flow rate on the Goodman \u003cstrong\u003eASZ130241AE\u003c\/strong\u003e 13 SEER, 2-ton heat pump. The precisely drilled orifice restricts liquid refrigerant into the coil to create the pressure drop needed for proper evaporation and system capacity. Using the correct piston size is critical to reaching rated efficiency and correct superheat\/subcooling — an undersized or oversized bore starves or floods the coil.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFits: Goodman ASZ130241AE heat pump; verify bore against the unit rating plate\u003c\/li\u003e\n\u003cli\u003ePart type: Refrigerant metering piston \/ flow-control orifice\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B1789857\u003c\/li\u003e\n\u003cli\u003eFunction: Meters liquid refrigerant to the coil\u003c\/li\u003e\n\u003cli\u003eInstallation: Seats inside the factory piston housing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGeneric piston assortments require you to guess the correct bore, and an incorrect size directly hurts capacity and efficiency. The OEM B1789857 is the exact orifice specified for this platform, so the system charges and performs to Goodman's published ratings.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eProfessional (4\/5).\u003c\/strong\u003e Requires refrigerant recovery, opening the metering-device housing, seating the piston, then evacuating and recharging. Best performed by an EPA-certified technician during a coil or airflow service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058305057139,"sku":"GOODMAN-16169","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-kit-for-asz130241ae-heat-pump-b1789857","provider":"National HVAC Parts","version":"1.0","type":"link"}