{"product_id":"oem-goodman-piston-flowrator-kit-for-asz130361ad-heat-pump-b1789868","title":"OEM Goodman Piston \/ Flowrator Kit for ASZ130361AD Heat Pump — B1789868","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1789868\u003c\/strong\u003e is a genuine OEM piston (flowrator) metering kit for the \u003cstrong\u003eASZ130361AD\u003c\/strong\u003e 3-ton heat pump. This precision-bored orifice regulates refrigerant flow into the coil, and its exact bore size is matched to the unit's capacity and refrigerant charge to deliver correct superheat, subcooling, and rated efficiency.\u003c\/p\u003e\u003cp\u003eUsing the wrong piston size — or a worn, debris-clogged one — leads to poor heating and cooling performance, high head pressure, or compressor strain. This inexpensive kit is essential during coil or line-set replacement and any time the metering device is suspect.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789868\u003c\/li\u003e\n\u003cli\u003eFits: Goodman ASZ130361AD heat pump\u003c\/li\u003e\n\u003cli\u003eType: Fixed-orifice piston \/ flowrator metering device\u003c\/li\u003e\n\u003cli\u003eApplication: Refrigerant metering at the coil inlet\u003c\/li\u003e\n\u003cli\u003eBore: Factory-sized for ASZ13 3-ton capacity\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (genuine OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGeneric assorted-piston packs require you to identify the correct bore yourself, and an incorrect size quietly robs capacity and efficiency. The OEM B1789868 is pre-matched to the ASZ130361AD, removing sizing guesswork and protecting the compressor.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eProfessional (4\/5).\u003c\/strong\u003e Requires EPA Section 608 certification — the system must be recovered, the metering device opened, the piston swapped, then evacuated and recharged. Best left to a licensed HVAC technician; not a DIY repair.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058308301171,"sku":"GOODMAN-16238","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-flowrator-kit-for-asz130361ad-heat-pump-b1789868","provider":"National HVAC Parts","version":"1.0","type":"link"}