{"product_id":"oem-goodman-refrigerant-piston-flowrator-kit-for-gmpv100-3-b1789865","title":"OEM Goodman Refrigerant Piston \/ Flowrator Kit for GMPV100-3 — B1789865","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789865 Piston Kit\u003c\/strong\u003e is the OEM refrigerant metering piston (flowrator) for the \u003cstrong\u003eGoodman\/Amana GMPV100-3\u003c\/strong\u003e packaged unit. This small but critical component meters liquid refrigerant into the evaporator coil, maintaining the correct pressure drop and superheat for efficient cooling. A worn, wrong-size, or debris-clogged piston causes poor cooling, high head pressure, or coil freeze-ups — this kit restores factory metering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eComponent: Fixed-orifice refrigerant piston (flowrator)\u003c\/li\u003e\n\u003cli\u003eApplication: Liquid-line metering device\u003c\/li\u003e\n\u003cli\u003eCompatible refrigerants: Per Goodman unit spec (R-410A \/ R-22 platform)\u003c\/li\u003e\n\u003cli\u003eIncludes: Piston and seal(s) as applicable\u003c\/li\u003e\n\u003cli\u003eFits: Goodman\/Amana GMPV100-3 packaged units\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B1789865\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman B1789865\u003c\/strong\u003e is bored to the exact orifice diameter Goodman rates for this unit's capacity, which is essential for correct charge and efficiency. Generic pistons come in assorted bore sizes and require you to match the number precisely — an incorrect bore hurts capacity and can damage the compressor. For metering accuracy, the OEM piston is the safe choice.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Advanced (HVAC pro recommended).\u003c\/strong\u003e Requires recovering refrigerant, opening the liquid line, replacing the piston, evacuating, and recharging by weight. EPA Section 608 certification is required to handle refrigerant. Not a DIY job unless you are certified and equipped.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058151211379,"sku":"GOODMAN-12142","price":6.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-refrigerant-piston-flowrator-kit-for-gmpv100-3-b1789865","provider":"National HVAC Parts","version":"1.0","type":"link"}