{"product_id":"sp735l-furnace-control-circuit-board-ignition-module-18g9101","title":"SP735L Furnace Control Circuit Board Ignition Module 18G9101","description":"\u003cp\u003e\u003cstrong\u003e\u003cem\u003eThis product may contain shelf wear, have minor cosmetic imperfections, or have been tested. All our certified pre-owned products are backed by our return policy. We offer free shipping on all items. Please contact us for discounts or if you have any questions. We look forward to doing business with you!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eSP735L Furnace Control Circuit Board Ignition Module (Part Number 18G9101)\u003c\/strong\u003e is a replacement ignition control board designed for use in gas-fired furnace systems. This module manages the ignition sequence, flame sensing, and safety shutdown functions essential for reliable furnace operation.\u003c\/p\u003e\n\n\u003cp\u003eThis circuit board serves as the central control point for coordinating blower motor activation, gas valve operation, and hot surface igniter sequencing. It is commonly found in residential and light commercial furnace applications and is designed as a direct replacement for systems originally equipped with the 18G9101 control board. The SP735L is engineered for dependable performance and straightforward installation, typically featuring plug-in wiring harness connections that align with the original board's configuration.\u003c\/p\u003e\n\n\u003cp\u003eThe ignition module includes built-in diagnostic capabilities, often indicated by LED status codes, which assist technicians in troubleshooting system faults. Its solid-state design ensures consistent ignition control and enhanced safety monitoring throughout each heating cycle.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e SP735L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 18G9101\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Furnace Control Circuit Board \/ Ignition Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Gas-fired residential and light commercial furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e Typically rated at 24VAC control voltage \/ 120VAC line voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e Hot Surface Ignition (HSI) control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e Integrated flame sensing, safety lockout, and diagnostic LED indicators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Direct drop-in replacement with plug-in wiring connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf you have questions about compatibility with your specific furnace model or system configuration, please contact us before purchasing. Our team can help verify that this control board is the correct match for your application.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":43672942772333,"sku":"12998","price":269.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/2419\/1853\/files\/s-l800_13ea7b3b-4abd-467f-824f-30114348dc0a.jpg?v=1763343986","url":"https:\/\/willardshvacsupply.com\/products\/sp735l-furnace-control-circuit-board-ignition-module-18g9101","provider":"Willard's HVAC Supply","version":"1.0","type":"link"}