{"product_id":"ferroli-optimax-25s-25ov-25c-gas-valve-39810420","title":"FERROLI OPTIMAX 25S 25OV 25C GAS VALVE 39810420","description":"\u003ch1\u003e\u003cspan\u003eFerroli Optimax 25S 25OV 25C Boiler Gas Valve 39810420\u003c\/span\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan\u003eProduct Overview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFerroli Optimax Boiler Gas Valve (Part Number: 39810420)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a gas control component intended for selected \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFerroli\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e heating systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe gas valve forms part of the boiler's combustion system, controlling the supply of gas to the burner in accordance with the appliance's operating requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt operates alongside the boiler's electronic controls and combustion components to support controlled ignition and burner operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCorrect gas valve operation is essential for safe and reliable boiler performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eℹ️ Product Condition Options:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis part may be available in \u003c\/span\u003e\u003cem\u003e\u003cspan\u003eNew\u003c\/span\u003e\u003c\/em\u003e\u003cspan\u003e or \u003c\/span\u003e\u003cem\u003e\u003cspan\u003eRefurbished\u003c\/span\u003e\u003c\/em\u003e\u003cspan\u003e condition. Please select your desired option from the dropdown menu above. Any refurbished gas valve must be professionally inspected and tested to confirm that it meets the required operating and safety specifications before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Insight \u0026amp; Common Failure Symptoms\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe boiler gas valve is a safety-critical component responsible for controlling gas flow to the burner during the appliance's operating sequence.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe valve works in conjunction with the boiler's ignition system, electronic controls and combustion components. A fault affecting the gas valve or its associated connections may prevent the burner from operating correctly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePossible symptoms that may indicate a gas valve or associated combustion system problem include:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler failing to ignite or fire correctly.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBurner failing to establish or maintain a flame.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIntermittent burner operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler entering an ignition-related safety lockout.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler failing to respond correctly to heating or hot water demand.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGas valve failing to operate when correctly commanded.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eElectrical or control-related faults affecting burner operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThese symptoms do \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003enot necessarily confirm a faulty gas valve\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, as similar problems may result from ignition electrodes, gas supply issues, wiring, electronic controls or other combustion components. Correct professional diagnosis should be carried out before replacement.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCompatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis part (MPN: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e39810420\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e) is associated with selected \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFerroli Optimax\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e boiler systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease verify the exact boiler model, GC number, part number, gas type and valve specifications against the manufacturer's technical documentation before ordering to ensure correct fitment.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSafety Advice\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eBoiler gas valves are safety-critical components within the appliance's gas and combustion system. Inspection, removal, installation and adjustment must only be carried out by a \u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003cem\u003e\u003cspan\u003eGas Safe registered engineer\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003e\u003cspan\u003e who is suitably qualified for the appliance and fuel type.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eAlways isolate the appliance and gas supply before carrying out any work and follow the manufacturer's installation and servicing instructions. The gas valve must be correctly installed and commissioned in accordance with the manufacturer's requirements. All necessary gas-tightness, combustion analysis, burner operation and operational safety checks must be completed before the boiler is returned to service.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"FERROLI","offers":[{"title":"New \/ Genuine","offer_id":50650146472039,"sku":"N7861","price":63.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/0923\/8887\/files\/61ICLgk-WWS_8a14d62f-67ac-49f6-8bd4-6822df0b456b.jpg?v=1792760710","url":"https:\/\/nationalboilerspares.co.uk\/products\/ferroli-optimax-25s-25ov-25c-gas-valve-39810420","provider":"National Boiler Spares","version":"1.0","type":"link"}