{"product_id":"baxi-duotec-platinum-28-pcb-7690350","title":"Baxi DuoTEC \u0026 Platinum 28 PCB 7690350","description":"\u003ch1\u003e\u003cspan\u003eBaxi DuoTEC \u0026amp; Platinum 28 PCB 7690350\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\u003eBaxi Boiler Printed Circuit Board (Part Number: 7690350)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is an electronic control component designed for selected \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBaxi DuoTEC 28 and Platinum 28\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e combi boilers, including specific HE A and ErP versions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIdentified as a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ePCB Kit Combi 28 HE (4 Coil)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, this component forms part of the boiler's central electronic control system, coordinating and monitoring essential functions in response to signals from the appliance's sensors, thermostats and operating controls.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe printed circuit board (PCB) manages key operating processes, including \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eignition sequencing, burner control, central heating and domestic hot water operation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, while communicating with associated electrical and safety components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIts electronic circuitry processes operating demands and safety-related signals, allowing the boiler to activate the appropriate components and respond to abnormal operating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCorrect operation is essential for maintaining reliable boiler start-up, consistent heating and hot water performance, and safe, controlled appliance operation.\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 printed circuit boards should be professionally inspected and tested to confirm their condition, correct operation and suitability for 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 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBaxi PCB 7690350\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e acts as the boiler's main electronic control centre, processing signals from temperature sensors, operating controls and safety devices. It coordinates the operation of connected components, including the fan, ignition system, gas valve and circulation pump, according to the boiler's programmed operating sequence.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eElectrical faults, deterioration of electronic components, damaged connections, moisture exposure or problems affecting the board's control circuitry may interfere with normal boiler operation, communication between components or safety monitoring.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePossible symptoms that may indicate a faulty PCB or associated electronic control problem include:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler failing to start despite receiving a heating or hot water demand.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler displaying fault codes or entering a safety lockout.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIntermittent boiler operation or unexpected shutdowns.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIgnition sequence failing to initiate or complete correctly.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCentral heating or domestic hot water functions failing to operate as expected.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFan, pump or other controlled components failing to activate when required.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler controls becoming unresponsive or operating inconsistently.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRepeated electrical or control-related faults during operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eVisible damage, overheating, corrosion or deterioration affecting the PCB or its electrical 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 PCB\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, as similar problems may result from the electrical supply, wiring, sensors, ignition components, fan, pump, gas valve or other connected controls. Correct professional diagnosis should be carried out before replacing the component.\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 printed circuit boards are essential electronic control components within gas-fired heating appliances. Inspection, removal, installation and testing must only be carried out by a \u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003cem\u003e\u003cspan\u003esuitably qualified heating engineer\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003e\u003cspan\u003e, with 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 required for work involving gas safety or combustion-related functions.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eAlways isolate the appliance's electrical supply before carrying out any work and follow the manufacturer's installation and servicing instructions.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eEnsure the correct \u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003cem\u003e\u003cspan\u003ePCB part number, appliance model, serial number and control configuration\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003e\u003cspan\u003e are verified before installation. Different versions of Baxi DuoTEC and Platinum boilers may require specific PCB configurations.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eHandle the printed circuit board carefully to avoid damage from electrostatic discharge, moisture or incorrect electrical connections. Never bypass or modify the boiler's electronic safety controls.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eWhere required by the manufacturer's instructions, complete the appropriate \u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003cem\u003e\u003cspan\u003ePCB configuration, electrical safety checks, ignition testing, combustion checks and operational safety verification\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003e\u003cspan\u003e before returning the boiler to service.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eIf electrical damage, overheating or unsafe boiler operation is suspected, do not operate the appliance until it has been inspected by a suitably qualified professional.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"BAXI","offers":[{"title":"New Other","offer_id":51602797396071,"sku":"N5093","price":84.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/0923\/8887\/files\/edited-photo-2026-11-13T152623.917.jpg?v=1794583680","url":"https:\/\/nationalboilerspares.co.uk\/products\/baxi-duotec-platinum-28-pcb-7690350","provider":"National Boiler Spares","version":"1.0","type":"link"}