{"product_id":"nordyne-626421r-hot-surface-ignition-control-board-module","title":"Nordyne 626421R Hot Surface Ignition Control Board Module","description":"\u003ch4 class=\"PDq2pG_selectionAnchorContainer\"\u003eDescription\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp dir=\"auto\" data-start=\"16\" data-end=\"396\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe Nordyne 626421R is an OEM hot surface ignition (HSI) control board engineered for residential gas furnaces. Operating as a primary ignition management module, it controls the igniter warm-up sequence, gas valve energization, and flame sensing circuits. This unit provides direct factory replacement to restore safe and reliable burner ignition across compatible heating systems.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003ctable data-path-to-node=\"4\" style=\"width: 70.3125%;\" height=\"378\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,1,0,0\"\u003e\u003cb data-path-to-node=\"4,1,0,0\" data-index-in-node=\"0\"\u003eCondition\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,1,1,0\"\u003eNew\/Never Used Surplus\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,2,0,0\"\u003e\u003cb data-path-to-node=\"4,2,0,0\" data-index-in-node=\"0\"\u003eBrand\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,2,1,0\"\u003eNordyne\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,3,0,0\"\u003e\u003cb data-path-to-node=\"4,3,0,0\" data-index-in-node=\"0\"\u003eCategory\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,3,1,0\"\u003eControls \u0026amp; Indicators\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,4,0,0\"\u003e\u003cb data-path-to-node=\"4,4,0,0\" data-index-in-node=\"0\"\u003ePart Number\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,4,1,0\"\u003e626421R\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,5,0,0\"\u003e\u003cb data-path-to-node=\"4,5,0,0\" data-index-in-node=\"0\"\u003eSubcategory\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,5,1,0\"\u003eTemperature\/Process Control\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,6,0,0\"\u003e\u003cb data-path-to-node=\"4,6,0,0\" data-index-in-node=\"0\"\u003eProduct Type\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,6,1,0\"\u003eHot Surface Ignition Module\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,7,0,0\"\u003e\u003cb data-path-to-node=\"4,7,0,0\" data-index-in-node=\"0\"\u003eIgnition Method\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,7,1,0\"\u003eHot Surface Ignition (HSI)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,8,0,0\"\u003e\u003cb data-path-to-node=\"4,8,0,0\" data-index-in-node=\"0\"\u003eFunctions Controlled\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,8,1,0\"\u003eIgniter Timing, Gas Valve, Flame Sensing\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,9,0,0\"\u003e\u003cb data-path-to-node=\"4,9,0,0\" data-index-in-node=\"0\"\u003eApplication\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,9,1,0\"\u003eResidential Gas Furnaces\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 35.294118%;\"\u003e\u003cspan data-path-to-node=\"4,10,0,0\"\u003e\u003cb data-path-to-node=\"4,10,0,0\" data-index-in-node=\"0\"\u003eWeight\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 63.488844%;\"\u003e\u003cspan data-path-to-node=\"4,10,1,0\"\u003e1.0 lb\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003e626421R\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe 626421R is a high-reliability electronic control module manufactured by Nordyne to regulate gas furnace burner sequences. Built with micro-processor circuitry, it oversees time-delayed hot surface igniter heating to ensure safe ignition of incoming fuel gases. It continuously monitors the flame rectification signal, initiating immediate fuel shutoff if a flame failure or improper combustion is detected. Designed for straightforward field replacement, it aligns with factory cabinet mounting locations and interfaces cleanly with original system wiring harnesses.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"1,0,0\"\u003eHot Surface Ignition Control: Regulates precise timing and current flow to hot surface igniters for consistent burner lighting.\u003c\/li\u003e\n\u003cli data-path-to-node=\"1,1,0\"\u003eFlame Rectification Monitoring: Actively checks flame sensor signals during operation to prevent unburned gas accumulation.\u003c\/li\u003e\n\u003cli data-path-to-node=\"1,2,0\"\u003eSafety Interlock Response: Triggers immediate gas valve shutdown upon loss of flame signal or limit switch open state.\u003c\/li\u003e\n\u003cli data-path-to-node=\"1,3,0\"\u003eSolid-State Circuitry: Constructed with industrial-grade micro-components designed to withstand ongoing thermal cycling.\u003c\/li\u003e\n\u003cli data-path-to-node=\"1,4,0\"\u003eDirect OEM Replacement: Engineered to match original terminal markings and mounting configurations for fast service setup.\u003c\/li\u003e\n\u003cli data-path-to-node=\"1,5,0\"\u003eLightweight Compact Form: Weighs 0.45 kg (1.0 lb) for easy handling and installation within narrow furnace control compartments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"2\"\u003eThe 626421R delivers the reliability and precision required for safe furnace ignition and efficient gas burner operation.\u003c\/p\u003e\n\u003cp id=\"p-rc_c7b8f4fae39e183e-25\"\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Nordyne","offers":[{"title":"Default Title","offer_id":52820248625450,"sku":"626421R","price":359.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/s-l1600_5e79bd61-850b-4833-85d7-eb5fc11c46a5.jpg?v=1790941136","url":"https:\/\/iqelectro.com\/products\/nordyne-626421r-hot-surface-ignition-control-board-module","provider":"IQElectro","version":"1.0","type":"link"}