{"product_id":"521099-suburban-rv-furnace-ignition-control-board","title":"521099 Suburban RV Furnace Ignition Control Board","description":"\u003ch1\u003e521099 – Suburban RV Furnace Ignition Control Board\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan style=\"background-color: rgb(255, 255, 0);\"\u003e(Furnaces made after 2014)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cstrong\u003eReplaces: 520820, 521099MC, 521314\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eThe \u003cstrong\u003e521099 Suburban RV Furnace Ignition Control Board\u003c\/strong\u003e is the OEM replacement ignition module used in many Suburban RV furnaces. It restores proper ignition sequencing, flame sensing, and safety‑circuit operation when the original board fails due to age, heat stress, or electrical damage. The product page you have open confirms the SKU, pricing, and classification as a furnace control board\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cstrong\u003eSuburban 521099\u003c\/strong\u003e is a factory-authorized \u003cstrong\u003eDSI ignition control board\u003c\/strong\u003e designed for safe startup and flame monitoring in select \u003cstrong\u003eSuburban RV furnaces and water heaters\u003c\/strong\u003e. This direct-spark ignition (DSI) module ensures reliable burner operation by managing the ignition cycle and verifying flame presence before engaging heating.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat the 521099 Ignition Board Does\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThis board manages the full ignition cycle of a Suburban furnace, including:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSending power to the ignitor for spark generation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eMonitoring the flame sensor to confirm ignition\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eControlling gas valve opening and safety shutoff\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCoordinating with the blower motor and limit\/sail switches\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLockout protection if ignition fails\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eA failing board often causes symptoms like no ignition, repeated clicking without flame, furnace short‑cycling, or complete no‑heat conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e🔧 Key Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 521099\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIgnition Type\u003c\/strong\u003e: Direct Spark Ignition (DSI)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e: 12V DC control circuit\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e: Suburban RV furnaces \u0026amp; water heaters\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHousing Color\u003c\/strong\u003e: Typically gray or silver\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.789\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e: HVAC Controls \u0026gt; RV Heating Components\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eStock Location\u003c\/strong\u003e: Suburban RV\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e: 521099\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOEM Suburban ignition control board\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDirect replacement for compatible Suburban RV furnaces\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRestores proper ignition and flame‑sense operation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWorks with existing furnace wiring harness and safety switches\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDurable PCB design for high‑heat furnace compartments\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Laurelhurst","offers":[{"title":"Default Title","offer_id":45561392431170,"sku":"S521099MC","price":125.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/8320\/files\/71pST3fLs2L._AC_SL1500.jpg?v=1751433474","url":"https:\/\/hvacpartstore.com\/products\/521099-suburban-rv-furnace-ignition-control-board","provider":"HVACpartstore","version":"1.0","type":"link"}