{"product_id":"vaillant-eco-tec-vuw-exclusive-832-838-ecotec-plus-vui-937-flow-sensor-178988-original","title":"VAILLANT ECO TEC VUW EXCLUSIVE 832 838 \u0026 ECOTEC PLUS VUI 937 FLOW SENSOR 178988 ORIGINAL","description":"\u003ch1\u003e\u003cspan\u003eVaillant ecoTEC Exclusive 832 838 ecoTEC Plus VUI 937 Boiler Flow Sensor 178988\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\u003eVaillant Boiler Flow Sensor (Part Number: 178988)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a water flow detection component designed for selected \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVaillant\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e heating systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e178988\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is identified in Vaillant's technical documentation as a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFlow Sensor (Black)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, forming part of the boiler's domestic hot water hydraulic control arrangement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe flow sensor detects water flow within the system, providing information used by the boiler's electronic controls to respond to domestic hot water demand.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCorrect flow detection is important for reliable hot water operation and appropriate boiler response when a hot water outlet is opened.\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. Refurbished components should be professionally inspected and tested to confirm correct operation 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 flow sensor forms part of the boiler's domestic hot water control system. It detects water movement and provides a signal to the appliance's electronic control system when domestic hot water is required.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA fault affecting the sensor, its electrical connections or the associated water flow arrangement may interfere with the boiler's ability to recognise hot water demand.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePossible symptoms that may indicate a flow sensor or associated component problem include:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler failing to respond when a hot water tap is opened.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDomestic hot water failing to heat correctly.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIntermittent hot water operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler failing to recognise domestic hot water demand.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIrregular response to changes in water flow.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eElectrical connection or flow detection-related faults.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eVisible damage or leakage around the sensor connections.\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 flow sensor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, as similar problems may result from water flow restrictions, wiring, electrical controls or other hydraulic 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\u003e178988\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e) is associated with selected \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVaillant ecoTEC Exclusive and ecoTEC Plus\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, serial number, part number, sensor configuration and hydraulic connections 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 flow sensors and associated electrical and hydraulic components should only be inspected, removed or installed by a \u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003cem\u003e\u003cspan\u003esuitably qualified and competent heating engineer\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eAlways isolate the appliance's electrical supply and relevant water supplies before carrying out any work. Allow the system to cool and safely release residual pressure before removing the sensor. Follow the manufacturer's servicing instructions and complete all required electrical, leakage and operational safety checks before returning the boiler to service.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"VAILLANT","offers":[{"title":"New \/ New Other","offer_id":50677280833639,"sku":"N5412","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/0923\/8887\/files\/edited-photo_85_ecca995c-54e8-4ea8-87fd-b93fe095da19.jpg?v=1793006353","url":"https:\/\/nationalboilerspares.co.uk\/products\/vaillant-eco-tec-vuw-exclusive-832-838-ecotec-plus-vui-937-flow-sensor-178988-original","provider":"National Boiler Spares","version":"1.0","type":"link"}