{"product_id":"oem-goodman-flow-check-piston-kit-for-gsc130483ba-b1789888-1","title":"OEM Goodman Flow Check Piston Kit for GSC130483BA — B1789888","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789888 Flow Check Piston Kit\u003c\/strong\u003e is the genuine OEM refrigerant metering device for the \u003cstrong\u003eGSC130483BA\u003c\/strong\u003e condensing unit and matched indoor coils. The flow check piston (fixed orifice) controls refrigerant flow into the evaporator coil, ensuring correct system charge balance and cooling capacity. A worn, clogged, or incorrectly sized piston causes poor cooling, frosting, and pressure imbalances — installing the factory-spec orifice restores rated performance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789888\u003c\/li\u003e\n\u003cli\u003eFits Model: GSC130483BA\u003c\/li\u003e\n\u003cli\u003eType: Flow check piston \/ fixed orifice kit\u003c\/li\u003e\n\u003cli\u003eFunction: Refrigerant metering device\u003c\/li\u003e\n\u003cli\u003eIncludes: Piston and seal hardware\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis \u003cstrong\u003egenuine Goodman OEM piston kit\u003c\/strong\u003e is bored to the precise orifice size matched to the GSC130483BA's tonnage and coil pairing. Generic pistons with the wrong bore diameter will misfeed the coil and degrade efficiency. OEM guarantees the correct metering rate for proper superheat and subcooling.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Advanced.\u003c\/strong\u003e Installation requires recovering refrigerant, opening the liquid-line connection at the indoor coil, swapping the piston, and re-evacuating and recharging the system. This is EPA-certified technician work — improper handling of refrigerant is unsafe and illegal for unlicensed individuals. Plan for 1–2 hours.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057197924723,"sku":"GOODMAN-774","price":10.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-flow-check-piston-kit-for-gsc130483ba-b1789888-1","provider":"National HVAC Parts","version":"1.0","type":"link"}