{"product_id":"worcester-greenstar-gas-valve-848-sigma-refurbished-871860004a0","title":"Worcester Greenstar Gas Valve 848 Sigma – Pre-Owned | Part No. 871860004A0","description":"\u003cp\u003eIgnition failure, flame instability, or inconsistent heating output in a Worcester Greenstar i Combi or i System ERP boiler often points directly to a faulty gas valve. This precision component controls the flow of gas to the burner — when it fails or drifts out of calibration, combustion performance drops and the boiler can lock out entirely. The \u003cstrong\u003eWorcester Greenstar Gas Valve 848 Sigma (Part No. 871860004A0)\u003c\/strong\u003e is the correct replacement, restoring accurate gas regulation and stable, safe combustion across the compatible Greenstar i range.\u003c\/p\u003e\n\n\u003cp\u003eThis pre-owned unit has been removed from a fully functioning boiler and tested by our qualified engineers to confirm reliable performance. It fits the Greenstar 25i and 30i Combi ERP, plus the 9i through 24i System ERP and 27i\/30i System Compact ERP models, including LPG variants. Supplied with a \u003cstrong\u003e6-month warranty\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible Boiler Models\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eGC No.\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 25i Combi ERP\u003c\/td\u003e\n\u003ctd\u003e47-406-60 (7733600012)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 25i Combi ERP LPG\u003c\/td\u003e\n\u003ctd\u003e47-406-61 (7733600031)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 30i Combi ERP\u003c\/td\u003e\n\u003ctd\u003e47-406-62 (7733600005)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 30i Combi ERP LPG\u003c\/td\u003e\n\u003ctd\u003e47-406-63 (7733600032)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 9 i System ERP\u003c\/td\u003e\n\u003ctd\u003e41-406-21 (7733600011)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 9 i System ERP LPG\u003c\/td\u003e\n\u003ctd\u003e41-406-22 (7733600033)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 12 i System ERP\u003c\/td\u003e\n\u003ctd\u003e41-406-23 (7733600010)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 12 i System ERP LPG\u003c\/td\u003e\n\u003ctd\u003e41-406-24 (7733600034)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 15 i System ERP\u003c\/td\u003e\n\u003ctd\u003e41-406-25 (7733600009)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 15 i System ERP LPG\u003c\/td\u003e\n\u003ctd\u003e41-406-26 (7733600035)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 18 i System ERP\u003c\/td\u003e\n\u003ctd\u003e41-406-27 (7733600008)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 18 i System ERP LPG\u003c\/td\u003e\n\u003ctd\u003e41-406-28 (7733600036)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 21 i System ERP\u003c\/td\u003e\n\u003ctd\u003e41-406-29 (7733600007)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 21 i System ERP LPG\u003c\/td\u003e\n\u003ctd\u003e41-406-30 (7733600037)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 24 i System ERP\u003c\/td\u003e\n\u003ctd\u003e41-406-31 (7733600006)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 24 i System ERP LPG\u003c\/td\u003e\n\u003ctd\u003e41-406-32 (7733600038)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 27 i System Compact ERP\u003c\/td\u003e\n\u003ctd\u003e41-406-58 (7733600060)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 27 i System Compact ERP LPG\u003c\/td\u003e\n\u003ctd\u003e41-406-59 (7733600061)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 30 i System Compact ERP\u003c\/td\u003e\n\u003ctd\u003e41-406-60 (7733600062)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreenstar 30 i System Compact ERP LPG\u003c\/td\u003e\n\u003ctd\u003e41-406-61 (7733600063)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTested. Reliable. Warranted.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvery pre-owned gas valve we supply is removed from a working boiler and tested by our experienced engineering team to verify proper gas regulation and safe operation. This 871860004A0 unit resolves ignition faults and heating instability caused by a failing valve in Worcester Greenstar i series boilers. Supplied with a \u003cstrong\u003e6-month warranty\u003c\/strong\u003e. A brand-new version with a 12-month warranty is also available — please enquire.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDelivery \u0026amp; Returns\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrders placed before \u003cstrong\u003e1:00 PM (Mon–Fri)\u003c\/strong\u003e are dispatched the same working day, with standard and next-day delivery options at checkout. Returns are accepted within \u003cstrong\u003e30 days\u003c\/strong\u003e in original unused condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Please confirm that part number \u003cstrong\u003e871860004A0\u003c\/strong\u003e matches your existing gas valve before ordering. Installation must be carried out by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e to ensure safety compliance and warranty validity.\u003c\/p\u003e","brand":"Worcester","offers":[{"title":"Pre-Owned","offer_id":47950350876837,"sku":"GAS-2649-A-BC","price":34.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/1690\/8453\/files\/Worcester-Greenstar-Gas-Valve-848-Sigma-871860004A0-1.webp?v=1782581978","url":"https:\/\/ephsuppliers.com\/products\/worcester-greenstar-gas-valve-848-sigma-refurbished-871860004a0","provider":"Elite Plumbing \u0026 Heating Suppliers Ltd","version":"1.0","type":"link"}