{"product_id":"vaillant-ecotec-plus-637-837-937-main-heat-exchanger-refurbished-20025040","title":"Vaillant Ecotec Plus 637 \/ 837 \/ 937 Main Heat Exchanger (7 Coil) – Refurbished | Part No. 20025040","description":"\u003cp\u003eReduced heating output, poor energy efficiency, or unusual boiler behaviour in a Vaillant Ecotec Plus 637, 837, or 937 boiler is very commonly caused by a failing main heat exchanger. The \u003cstrong\u003eVaillant Ecotec Plus Main Heat Exchanger 20025040 (7 Coil)\u003c\/strong\u003e is a fully refurbished genuine Vaillant replacement that restores efficient heat transfer from the burner to the central heating circuit, returning your large-output Ecotec Plus boiler to reliable, high-efficiency performance.\u003c\/p\u003e\n\n\u003cp\u003eThis is a \u003cstrong\u003efully refurbished\u003c\/strong\u003e original Vaillant part, quality-tested before dispatch. The 7-coil design is the factory specification for the Ecotec Plus 637, 837, and 937 models, ensuring a direct like-for-like fit. Only 1 unit remaining in stock.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible Boiler Models\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eVariant\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eYears\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eGC No.\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eEcotec Plus 637\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eVU 376\/3-5 R1\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2006–2012\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e41-044-52\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eEcotec Plus 837\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eVUW 376\/3-5 R1\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2006–2011\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e47-044-33 R1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eEcotec Plus 837\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eVUW 376\/3-5 R3\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2011–2012\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e47-044-33 R3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eEcotec Plus 937\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eVUI 376\/3-5\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2006–2012\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e47-044-39\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\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVaillant part number 20025040 — 7-coil main heat exchanger, direct OEM replacement\u003c\/li\u003e\n\u003cli\u003eFully refurbished and quality-tested before dispatch\u003c\/li\u003e\n\u003cli\u003eFits Vaillant Ecotec Plus 637, 837 (R1 \u0026amp; R3), and 937 (2006–2012)\u003c\/li\u003e\n\u003cli\u003eRestores efficient heat transfer and resolves reduced heating output\u003c\/li\u003e\n\u003cli\u003eOnly 1 left in stock — order promptly to avoid disappointment\u003c\/li\u003e\n\u003cli\u003e12-month warranty included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDelivery \u0026amp; Returns\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrders placed before \u003cstrong\u003e1:00 PM\u003c\/strong\u003e (Monday–Friday) are dispatched the same working day. Standard and next-day delivery options available at checkout. Next-day orders placed on Fridays arrive Monday — select Saturday delivery at checkout for weekend delivery. Returns accepted within \u003cstrong\u003e30 days\u003c\/strong\u003e if unused and in original packaging.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Installation must be carried out by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Vaillant","offers":[{"title":"Refurbished","offer_id":48002419458213,"sku":"HEA-1712-A-BC","price":239.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/1690\/8453\/files\/SA1.jpg?v=1783862234","url":"https:\/\/ephsuppliers.com\/products\/vaillant-ecotec-plus-637-837-937-main-heat-exchanger-refurbished-20025040","provider":"Elite Plumbing \u0026 Heating Suppliers Ltd","version":"1.0","type":"link"}