{"product_id":"viessmann-7839451-ionization-electrode","title":"Viessmann 7839451 Ionization Electrode","description":"\u003cp\u003eThe \u003cstrong\u003eViessmann 7839451 Ionization Electrode\u003c\/strong\u003e is a critical flame-sensing component engineered for precise combustion monitoring in high-efficiency \u003cstrong\u003econdensing boilers\u003c\/strong\u003e. Designed specifically for the \u003cstrong\u003eVitodens 200-W\u003c\/strong\u003e (B2HA, B2HB series) and \u003cstrong\u003eVitodens 222-F\u003c\/strong\u003e (B2TB series), this electrode facilitates the ionization process required by the burner control unit to verify flame presence and modulate fuel flow. Maintaining a clean and properly gapped ionization rod is essential for preventing common \u003cstrong\u003eHVAC lockout codes\u003c\/strong\u003e such as F.380, which typically indicates a failure in flame detection or signal loss after ignition.\u003c\/p\u003e\n\n\u003cp\u003eConstructed with high-grade ceramic insulation and a durable metallic sensing rod, the \u003cstrong\u003eViessmann 7839451\u003c\/strong\u003e is built to withstand the rigorous cycling and high thermal stresses found within the combustion chamber. This kit includes the necessary \u003cstrong\u003eburner gasket\u003c\/strong\u003e, ensuring a gas-tight seal at the mounting interface to prevent flue gas recirculation or leaks. For contractors, frequent inspection of the \u003cstrong\u003eflame sensor\u003c\/strong\u003e for carbon buildup or oxidation is part of a standard \u003cstrong\u003eannual maintenance\u003c\/strong\u003e protocol to ensure peak performance and system reliability.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits for Technicians:\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOptimized Compatibility:\u003c\/strong\u003e Verified for use with Vitodens 200-W B2HA (28\/35), B2HB (26\/35), and B2TB (19\/35) models.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComplete Assembly:\u003c\/strong\u003e Includes the \u003cstrong\u003e7839451 ionization electrode\u003c\/strong\u003e and a professional-grade \u003cstrong\u003emounting gasket\u003c\/strong\u003e for a simplified installation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReliable Sensing:\u003c\/strong\u003e Provides accurate microamp (µA) signals to the control board, reducing nuisance trips and diagnostic time.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Engineered with thermal-resistant materials to help prevent ceramic cracking and signal interference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions \u0026amp; Technical Support:\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of a failing ionization electrode?\u003c\/strong\u003e\u003cbr\u003e\nTechnicians often encounter burner lockouts, intermittent ignition cycles, or specific flame-sensing error codes like F.380 or F.4 when the sensing rod is fouled or oxidized.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the gasket included with the electrode?\u003c\/strong\u003e\u003cbr\u003e\nYes, this part comes as a complete set with the specific gasket required to maintain a secure, pressurized seal on the burner door.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow often should this electrode be inspected?\u003c\/strong\u003e\u003cbr\u003e\nWe recommend checking the ionization current and physical condition of the rod during every annual service to ensure the flame signal stays within manufacturer-specified ranges.\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":42725082824882,"sku":"7839451","price":88.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_60a8a783-3a49-46a8-8405-d715870b1786.png?v=1788983221","url":"https:\/\/www.gsistore.com\/products\/viessmann-7839451-ionization-electrode","provider":"GSIstore","version":"1.0","type":"link"}