{"product_id":"worcester-greenstar-4000-heat-exchanger-cw-sump-refurbished-8716121449","title":"Worcester Greenstar 4000 Heat Exchanger C\/W Sump – Refurbished | Part No. 8716121449","description":"\u003cp\u003eReduced heating output, inefficient hot water, or boiler lockouts in a Worcester Greenstar GR4700IW (Greenstar 4000) boiler — across 12s to 30c models in both NG and LPG variants — often trace back to a heat exchanger that's no longer transferring heat from the burner effectively. The \u003cstrong\u003eWorcester Greenstar 4000 Heat Exchanger Complete With Sump, Part No. 8716121449\u003c\/strong\u003e, is the genuine professionally refurbished replacement that restores reliable heat transfer across this full Greenstar 4000 compatibility range.\u003c\/p\u003e\n\n\u003cp\u003eThis is a fully \u003cstrong\u003erefurbished\u003c\/strong\u003e genuine Worcester Bosch component — professionally cleaned, inspected, and tested before dispatch. Supplied complete with sump.\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\u003cth\u003eSerial No.\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 12s LPG\u003c\/td\u003e\n\u003ctd\u003e41-800-08\u003c\/td\u003e\n\u003ctd\u003e7733600378\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 12s NG\u003c\/td\u003e\n\u003ctd\u003e41-800-07\u003c\/td\u003e\n\u003ctd\u003e7733600377\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 15s LPG\u003c\/td\u003e\n\u003ctd\u003e41-800-10\u003c\/td\u003e\n\u003ctd\u003e7733600380\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 15s NG\u003c\/td\u003e\n\u003ctd\u003e41-800-09\u003c\/td\u003e\n\u003ctd\u003e7733600379\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 18s LPG\u003c\/td\u003e\n\u003ctd\u003e41-800-12\u003c\/td\u003e\n\u003ctd\u003e7733600382\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 18s NG\u003c\/td\u003e\n\u003ctd\u003e41-800-11\u003c\/td\u003e\n\u003ctd\u003e7733600381\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 21s LPG\u003c\/td\u003e\n\u003ctd\u003e41-800-14\u003c\/td\u003e\n\u003ctd\u003e7733600384\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 21s NG\u003c\/td\u003e\n\u003ctd\u003e41-800-13\u003c\/td\u003e\n\u003ctd\u003e7733600383\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 24s LPG\u003c\/td\u003e\n\u003ctd\u003e41-800-16\u003c\/td\u003e\n\u003ctd\u003e7733600386\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 24s NG\u003c\/td\u003e\n\u003ctd\u003e41-800-15\u003c\/td\u003e\n\u003ctd\u003e7733600385\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 25c LPG\u003c\/td\u003e\n\u003ctd\u003e47-800-31\u003c\/td\u003e\n\u003ctd\u003e7733600372\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 25c NG\u003c\/td\u003e\n\u003ctd\u003e47-800-30\u003c\/td\u003e\n\u003ctd\u003e7733600371\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 30c LPG\u003c\/td\u003e\n\u003ctd\u003e47-800-33\u003c\/td\u003e\n\u003ctd\u003e7733600374\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGR4700IW 30c NG\u003c\/td\u003e\n\u003ctd\u003e47-800-32\u003c\/td\u003e\n\u003ctd\u003e7733600373\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\u003eComplete With Sump. Professionally Tested. Backed by Warranty.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis refurbished 8716121449 heat exchanger (supplied complete with sump) restores reliable boiler operation, resolving heating failures, poor efficiency, and overheating lockouts in the full Greenstar 4000 \/ GR4700IW range. Supplied with a full \u003cstrong\u003e12-month warranty\u003c\/strong\u003e.\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. Standard and next-day delivery options available. Returns accepted within \u003cstrong\u003e30 days\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Please confirm that part number \u003cstrong\u003e8716121449\u003c\/strong\u003e matches your existing unit before ordering. Installation must be carried out by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Worcester","offers":[{"title":"Refurbished","offer_id":48023312859301,"sku":"WORC-HXT-1449-N","price":140.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/1690\/8453\/files\/Worcester-8716121449-Heat-Exchanger-CW-Sump-Refurbished_7b52a4d4-7835-4312-b879-9534c8d9c4cc.png?v=1784391945","url":"https:\/\/ephsuppliers.com\/products\/worcester-greenstar-4000-heat-exchanger-cw-sump-refurbished-8716121449","provider":"Elite Plumbing \u0026 Heating Suppliers Ltd","version":"1.0","type":"link"}