{"product_id":"viessmann-7871315","title":"Viessmann 7871315 Control","description":"\u003cp\u003eThe \u003cstrong\u003eViessmann 7871315 Burner Control Unit\u003c\/strong\u003e is a critical microprocessor-based \u003cstrong\u003eLGM29.55B6201 burner controller\u003c\/strong\u003e specifically engineered for the \u003cstrong\u003eVitodens 200 WB2A\u003c\/strong\u003e series gas-fired condensing boilers. Designed to manage the entire combustion sequence, this genuine OEM \u003cstrong\u003eViessmann control board\u003c\/strong\u003e provides high-precision modulation of the fuel-air mixture, ensuring peak operational efficiency and reduced emissions. It serves as the primary logic module for \u003cstrong\u003eVitodens WB2A burner management\u003c\/strong\u003e, integrating flame monitoring, gas valve actuation, and diagnostic protocols into a single, robust platform. For service technicians, this unit is the direct \u003cstrong\u003eWB2A replacement control\u003c\/strong\u003e necessary for resolving ignition failures or communication errors within the boiler’s internal BUS system. Its technical architecture supports seamless communication with the VR20 circuit board and related sensors, maintaining the strict safety parameters required for high-efficiency hydronic heating. Professionals prioritize the \u003cstrong\u003eViessmann 7871315\u003c\/strong\u003e to restore factory-spec timing and safety shut-off speeds, ensuring local code compliance and reliable heat delivery in residential and commercial applications.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Microprocessor Control:\u003c\/strong\u003e Optimizes burner performance by continuously adjusting combustion parameters for the \u003cstrong\u003eVitodens 200\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect OEM Compatibility:\u003c\/strong\u003e Specifically programmed for the \u003cstrong\u003eWB2A\u003c\/strong\u003e chassis, ensuring plug-and-play integration with \u003cstrong\u003eLGM29.55B6201\u003c\/strong\u003e logic.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnhanced Safety Protocols:\u003c\/strong\u003e Provides rapid flame rectification and safety shut-offs to prevent unauthorized gas flow or hazardous conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptimized Energy Consumption:\u003c\/strong\u003e Matches fuel input to load demand, significantly improving the unit's seasonal efficiency (AFUE).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhich boiler models use the Viessmann 7871315 control?\u003c\/strong\u003e\u003cbr\u003e\nThis specific \u003cstrong\u003eburner control unit\u003c\/strong\u003e is primarily designed for the \u003cstrong\u003eViessmann Vitodens 200 WB2A\u003c\/strong\u003e series. Always verify the part number on your existing \u003cstrong\u003eLGM29\u003c\/strong\u003e controller to ensure an exact match.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this unit replace the LGM26 series controllers?\u003c\/strong\u003e\u003cbr\u003e\nWhile they appear similar, the \u003cstrong\u003e7871315\u003c\/strong\u003e is an \u003cstrong\u003eLGM29.55B6201\u003c\/strong\u003e. Technical specifications and internal firmware vary between versions; always refer to the specific boiler's parts list to confirm the correct logic board for your serial number.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of a failing Viessmann burner control?\u003c\/strong\u003e\u003cbr\u003e\nCommon indicators include persistent ignition lockouts, failure to detect flame despite a successful spark, or intermittent \"F\" series fault codes related to internal communication or burner supervision.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Viessmann","offers":[{"title":"Default Title","offer_id":43504627056818,"sku":"7871315","price":2486.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_9ce38c67-04a2-498a-85bb-bb34ef284b83.png?v=1752266937","url":"https:\/\/www.gsistore.com\/en-ca\/products\/viessmann-7871315","provider":"GSIstore","version":"1.0","type":"link"}