{"product_id":"oem-goodman-refrigerant-piston-orifice-kit-for-ash130301a-b1789865","title":"OEM Goodman Refrigerant Piston \/ Orifice Kit for ASH130301A — B1789865","description":"\u003ch2\u003eGoodman B1789865 Refrigerant Piston \/ Orifice Kit\u003c\/h2\u003e\u003cp\u003eThe Goodman B1789865 is a genuine OEM refrigerant metering piston (flowrator\/orifice) kit for the ASH130301A heat pump. This small but critical component meters the exact flow of refrigerant into the coil, setting the system's superheat and subcooling. The correct orifice bore size is essential to proper capacity, efficiency, and compressor protection.\u003c\/p\u003e\u003cp\u003ePistons are routinely replaced during coil changes, refrigerant conversions, or when a system shows poor cooling\/heating performance traced to an incorrect or clogged orifice. Using the factory-specified bore keeps the ASH130301A operating at its rated SEER and capacity.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B1789865\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Fixed-bore refrigerant metering piston (flowrator)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Model:\u003c\/strong\u003e ASH130301A heat pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Refrigerant flow metering \/ expansion device\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman \/ Amana\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New, genuine OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine B1789865 is bored to the precise orifice size Goodman engineered for this unit's tonnage and refrigerant. A generic piston with the wrong bore will over- or under-feed the coil, causing flooding, starving, high head pressure, or lost capacity. The OEM piston guarantees the correct metering for the ASH130301A.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eProfessional \/ Advanced\u003c\/strong\u003e — Replacing the piston requires recovering the refrigerant, opening the liquid line at the metering fitting, seating the new piston with the correct orientation, then evacuating and recharging. This is EPA-regulated refrigerant work best left to a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057153163635,"sku":"GOODMAN-B1789865","price":6.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-refrigerant-piston-orifice-kit-for-ash130301a-b1789865","provider":"National HVAC Parts","version":"1.0","type":"link"}