{"product_id":"worcester-greenstar-12i-28i-system-junior-he-control-box-87172078660","title":"Worcester Greenstar 12i-28i System\/Junior HE Control Box 87172078660","description":"\u003cdiv\u003e\n\u003cdiv class=\"flex h-svh w-screen flex-col\"\u003e\n\u003cdiv class=\"relative z-0 flex min-h-0 w-full flex-1\"\u003e\n\u003cdiv class=\"relative flex min-h-0 w-full min-w-0 flex-1\"\u003e\n\u003cdiv class=\"border-token-border-extra-light bg-token-main-surface-primary relative z-21 h-full shrink-0 overflow-hidden border-e max-md:hidden print:hidden stage-sidebar-pure-surface [--sidebar-surface-primary:var(--main-surface-primary)]\" id=\"stage-slideover-sidebar\"\u003e\n\u003cdiv class=\"relative flex h-full flex-col\"\u003e\n\u003cdiv class=\"opacity-100 motion-safe:transition-opacity motion-safe:duration-150 motion-safe:ease-linear h-full w-(--sidebar-width) overflow-x-clip overflow-y-auto text-clip whitespace-nowrap bg-token-main-surface-primary\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"@container\/main relative flex min-w-0 flex-1 flex-col -translate-y-[calc(env(safe-area-inset-bottom,0px)\/2)] pt-[calc(env(safe-area-inset-bottom,0px)\/2)]\"\u003e\n\u003cdiv data-scroll-root=\"\" class=\"@w-sm\/main:[scrollbar-gutter:var(--stage-scroll-gutter)] touch:[scrollbar-width:none] group\/scroll-root relative flex min-h-0 min-w-0 flex-1 flex-col [scrollbar-gutter:stable] not-print:overflow-x-clip not-print:overflow-y-auto group-data-stream-active\/scroll-root:[overflow-anchor:none] not-print:data-expanded-composer:overflow-y-hidden! scroll-pt-(--header-height) [--sticky-padding-top:var(--header-height)] [--sticky-padding-bottom:0px] [--scroll-root-safe-area-inset-top:calc(var(--sticky-padding-top)+env(safe-area-inset-top,0px))] [--scroll-root-safe-area-inset-bottom:calc(var(--sticky-padding-bottom)+var(--screen-keyboard-height,0px)+env(safe-area-inset-bottom,0px))] [--scroll-root-safe-area-height:calc(100lvh-var(--scroll-root-safe-area-inset-top)-var(--scroll-root-safe-area-inset-bottom))] has-data-[fixed-header=less-than-md]:md:scroll-pt-0 has-data-[fixed-header=less-than-md]:md:[--sticky-padding-top:0px] has-data-[fixed-header=less-than-xl]:@w-xl\/main:scroll-pt-0 has-data-[fixed-header=less-than-xl]:@w-xl\/main:[--sticky-padding-top:0px] has-data-[fixed-header=less-than-xxl]:@w-2xl\/main:scroll-pt-0 has-data-[fixed-header=less-than-xxl]:@w-2xl\/main:[--sticky-padding-top:0px]\" data-scroll-from-top=\"\"\u003e\n\u003cdiv class=\"contents\"\u003e\u003cmain class=\"not-keyboard-focused:outline-none min-h-0 flex-1\" id=\"main\" tabindex=\"-1\"\u003e\n\u003cdiv id=\"thread\" class=\"group\/thread flex flex-col min-h-full\"\u003e\n\u003cdiv role=\"presentation\" class=\"composer-parent flex flex-1 flex-col focus-visible:outline-0\"\u003e\n\u003cdiv data-voice-floating-orb-focus-background=\"\" class=\"relative basis-auto flex-col -mb-(--composer-overlap-px) pb-(--composer-overlap-px) [--composer-overlap-px:28px] grow flex\"\u003e\n\u003cdiv class=\"flex flex-col text-sm\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:9dfce689-d752-4cce-9cff-ca95eb5d588f-7\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:9dfce689-d752-4cce-9cff-ca95eb5d588f-7\" data-turn-id-container=\"request-WEB:9dfce689-d752-4cce-9cff-ca95eb5d588f-7\" data-testid=\"conversation-turn-2\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"f3e93af3-5c05-4909-9a3f-37f1eade1953\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003ch1 data-section-id=\"ao834e\" data-start=\"0\" data-end=\"78\"\u003eWorcester Greenstar 12i-28i System\/Junior HE Control Box 87172078660 \u003c\/h1\u003e\n\u003ch2 data-section-id=\"1p927wt\" data-start=\"80\" data-end=\"99\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"101\" data-end=\"484\"\u003eThe Worcester Greenstar 12i-28i System\/Junior HE Control Box 87172078660 is a genuine electronic control component used within Worcester Bosch heating appliances. The control box acts as the central management unit of the boiler, coordinating various functions including ignition, safety monitoring, temperature regulation, and communication between key boiler components.\u003c\/p\u003e\n\u003cp data-start=\"486\" data-end=\"646\"\u003eAs part of the boiler's electrical control system, this component helps ensure efficient, reliable, and safe operation during both heating and hot water demand.\u003c\/p\u003e\n\u003ch3 data-section-id=\"hydede\" data-start=\"648\" data-end=\"681\"\u003eℹ️ Product Condition Options:\u003c\/h3\u003e\n\u003cp data-start=\"683\" data-end=\"909\"\u003eThis item may be available in a\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"713\" data-end=\"720\"\u003eNew \u003c\/strong\u003econdition. Please select your desired option from the dropdown menu above. All refurbished components are professionally inspected to ensure reliability and performance.\u003c\/p\u003e\n\u003ch2 data-section-id=\"12yrgen\" data-start=\"911\" data-end=\"963\"\u003eTechnical Insight \u0026amp; Common Servicing Requirements\u003c\/h2\u003e\n\u003cp data-start=\"965\" data-end=\"1263\"\u003eControl boxes are critical electronic assemblies found within modern boiler systems and are continually exposed to operational demands, electrical loads, and varying environmental conditions. Over time, electronic components may experience wear or develop faults that can affect boiler performance.\u003c\/p\u003e\n\u003cp data-start=\"1265\" data-end=\"1355\"\u003eDuring routine servicing or repair work, engineers may inspect control units for signs of:\u003c\/p\u003e\n\u003cul data-start=\"1357\" data-end=\"1615\"\u003e\n\u003cli data-section-id=\"1hjqs16\" data-start=\"1357\" data-end=\"1402\"\u003e\n\u003cp data-start=\"1359\" data-end=\"1402\"\u003eBoiler lockout or intermittent fault codes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ujq4nc\" data-start=\"1403\" data-end=\"1440\"\u003e\n\u003cp data-start=\"1405\" data-end=\"1440\"\u003eIgnition or flame detection issues.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1gy8dnk\" data-start=\"1441\" data-end=\"1494\"\u003e\n\u003cp data-start=\"1443\" data-end=\"1494\"\u003eFailure to respond to heating or hot water demands.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1xtuii2\" data-start=\"1495\" data-end=\"1556\"\u003e\n\u003cp data-start=\"1497\" data-end=\"1556\"\u003eDamaged electrical connections or circuit board components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"142wdj6\" data-start=\"1557\" data-end=\"1615\"\u003e\n\u003cp data-start=\"1559\" data-end=\"1615\"\u003ePreventative replacement during major repair procedures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1617\" data-end=\"1756\"\u003eA faulty control box can affect boiler operation, potentially resulting in system shutdowns, reduced efficiency, or unreliable performance.\u003c\/p\u003e\n\u003ch2 data-section-id=\"14bu82z\" data-start=\"1758\" data-end=\"1774\"\u003eCompatibility\u003c\/h2\u003e\n\u003cp data-start=\"1776\" data-end=\"1904\"\u003eThis control box (MPN:\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1799\" data-end=\"1814\"\u003e87172078660\u003c\/strong\u003e) is used in a range of compatible Worcester Bosch Greenstar System and Junior HE boilers.\u003c\/p\u003e\n\u003cp data-start=\"1906\" data-end=\"2083\"\u003ePlease verify the manufacturer part number against your boiler's technical documentation, spare parts catalogue, or existing component before ordering to ensure correct fitment.\u003c\/p\u003e\n\u003ch2 data-section-id=\"nl3dl1\" data-start=\"2085\" data-end=\"2101\"\u003eSafety Advice\u003c\/h2\u003e\n\u003cp data-start=\"2103\" data-end=\"2251\"\u003e\u003cstrong data-start=\"2103\" data-end=\"2117\"\u003eImportant:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eInspection, servicing, and replacement of boiler components should only be carried out by a qualified and competent heating engineer.\u003c\/p\u003e\n\u003cp data-start=\"2253\" data-end=\"2466\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eBoilers contain pressurised water systems, electrical components, and gas-carrying parts. Always isolate the appliance and follow the manufacturer's instructions before carrying out any maintenance or repair work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"thread-bottom-container\" class=\"sticky bottom-0 z-10 group\/thread-bottom-container relative isolate w-full basis-auto has-data-has-thread-error:pt-2 has-data-has-thread-error:[box-shadow:var(--sharp-edge-bottom-shadow)] md:border-transparent md:pt-0 dark:border-white\/20 md:dark:border-transparent print:hidden content-fade single-line flex flex-col\"\u003e\n\u003cdiv class=\"relative mx-auto h-0\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv id=\"thread-bottom\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"text-base mx-auto [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 mb-[var(--thread-component-gap,1rem)]\"\u003e\n\u003cdiv class=\"w-full\"\u003e\n\u003cdiv class=\"pointer-events-auto relative z-1 flex h-(--composer-container-height,100%) max-w-full flex-(--composer-container-flex,1) flex-col\"\u003e\u003cform autocomplete=\"off\" class=\"group\/composer w-full\" data-type=\"unified-composer\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003cdiv class=\"bg-token-bg-primary dark:bg-token-bg-elevated-primary dark-oled:bg-token-bg-primary relative cursor-text overflow-clip bg-clip-padding 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relative w-full overflow-hidden text-center text-xs [view-transition-name:var(--vt-disclaimer)] md:px-[60px]\"\u003e\n\u003cdiv class=\"text-base mx-auto [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/main\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"National Boiler Spares","offers":[{"title":"New \/ New Other","offer_id":43941431672935,"sku":"N9524","price":120.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/0923\/8887\/files\/edited-photo_14.jpg?v=1781613228","url":"https:\/\/nationalboilerspares.co.uk\/products\/worcester-greenstar-12i-28i-system-junior-he-control-box-87172078660","provider":"National Boiler Spares","version":"1.0","type":"link"}