{"product_id":"oem-goodman-piston-kit-for-gmp125-4-b1789876","title":"OEM Goodman Piston Kit for GMP125-4 — B1789876","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1789876 Piston Kit\u003c\/strong\u003e is the genuine OEM metering piston set for \u003cstrong\u003eGMP125-4\u003c\/strong\u003e gas furnaces. The piston controls precise fuel metering at the burner, ensuring a clean, correctly sized flame and safe, efficient combustion. Using the factory-specified piston is important for proper heat output and to avoid sooting or nuisance limit trips caused by an incorrect orifice size.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1789876\u003c\/li\u003e\n\u003cli\u003eType: Furnace piston \/ metering kit\u003c\/li\u003e\n\u003cli\u003eCompatibility: Goodman GMP125-4 gas furnace\u003c\/li\u003e\n\u003cli\u003eFunction: Meters gas flow to the burner assembly\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (Genuine OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe OEM B1789876 kit is bored to Goodman's exact specification for the GMP125-4. Because even a small change in orifice diameter alters the firing rate, using a genuine OEM piston is strongly recommended over a generic substitute to keep the appliance within its rated input and combustion tolerances.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e Requires shutting off gas and power, accessing the burner\/manifold assembly, and swapping the piston. Combustion and gas work should be performed or verified by a qualified HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058137612659,"sku":"GOODMAN-11902","price":7.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-piston-kit-for-gmp125-4-b1789876","provider":"National HVAC Parts","version":"1.0","type":"link"}