{"product_id":"honeywell-st9120c4040-integrated-furnace-fan-control-board-for-gas-heating-systems","title":"Honeywell ST9120C4040 Integrated Furnace Fan Control Board for Gas Heating Systems","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"396\" data-start=\"144\"\u003eThe Honeywell ST9120C4040 is a replacement furnace fan control circuit board designed to manage blower operation in compatible heating systems. It ensures reliable fan control, optimized heating performance, and integration with existing HVAC components.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 352.688px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eHVAC Controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eST9120C4040\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eFurnace Fan Control Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eControls furnace blower operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eReplacement Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eDirect replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003e4 x 4 x 6 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eElectronic circuit board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eResidential and light commercial HVAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eVoltage Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eMatches furnace system specifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eOperational Role\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eControls fan activation, delay, and shutdown\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eUpright mounting in furnace control compartment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 39.1875px;\"\u003e\u003cstrong\u003eEnvironmental Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 39.1875px;\"\u003eBuilt for HVAC system conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003eWorks with select Honeywell and OEM furnaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.7783%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.8581%; height: 19.5938px;\"\u003e10 ounces\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\"\u003eST9120C4040\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp data-end=\"1069\" data-start=\"447\"\u003eThe ST9120C4040 is part of Honeywell’s line of integrated furnace control boards, engineered to regulate and coordinate the operation of heating system blowers. It is designed as a direct replacement for compatible furnaces, offering precise control over fan activation, delay, and shutdown sequences. Built with durable electronic components, the board supports stable operation even under varying environmental conditions. Compact in size and easy to install, the unit features a robust design for long service life, making it suitable for residential and light commercial heating applications.\u003c\/p\u003e\n\u003cp data-end=\"1090\" data-start=\"1071\"\u003e\u003cstrong data-end=\"1088\" data-start=\"1071\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"2019\" data-start=\"1091\"\u003e\n\u003cli data-end=\"1226\" data-start=\"1091\"\u003e\n\u003cp data-end=\"1226\" data-start=\"1093\"\u003e\u003cstrong data-end=\"1130\" data-start=\"1093\"\u003eDirect replacement compatibility:\u003c\/strong\u003e Designed to replace the ST9120C4040 board in compatible furnace systems without modification.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1343\" data-start=\"1227\"\u003e\n\u003cp data-end=\"1343\" data-start=\"1229\"\u003e\u003cstrong data-end=\"1258\" data-start=\"1229\"\u003eOptimized blower control:\u003c\/strong\u003e Coordinates blower on\/off cycles to ensure efficient heating and air distribution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1460\" data-start=\"1344\"\u003e\n\u003cp data-end=\"1460\" data-start=\"1346\"\u003e\u003cstrong data-end=\"1365\" data-start=\"1346\"\u003eCompact design:\u003c\/strong\u003e Measures approximately 4 x 4 x 6 inches, allowing easy fit within standard furnace housings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1584\" data-start=\"1461\"\u003e\n\u003cp data-end=\"1584\" data-start=\"1463\"\u003e\u003cstrong data-end=\"1499\" data-start=\"1463\"\u003eDurable electronic construction:\u003c\/strong\u003e Built with high-quality components for long-term reliability in HVAC environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1697\" data-start=\"1585\"\u003e\n\u003cp data-end=\"1697\" data-start=\"1587\"\u003e\u003cstrong data-end=\"1617\" data-start=\"1587\"\u003eEasy installation process:\u003c\/strong\u003e Designed for straightforward replacement, reducing downtime during servicing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1809\" data-start=\"1698\"\u003e\n\u003cp data-end=\"1809\" data-start=\"1700\"\u003e\u003cstrong data-end=\"1731\" data-start=\"1700\"\u003ePrecise operational timing:\u003c\/strong\u003e Controls fan delays and sequences to improve comfort and energy efficiency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1919\" data-start=\"1810\"\u003e\n\u003cp data-end=\"1919\" data-start=\"1812\"\u003e\u003cstrong data-end=\"1839\" data-start=\"1812\"\u003eWide application range:\u003c\/strong\u003e Compatible with a variety of Honeywell and other manufacturer furnace models.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2019\" data-start=\"1920\"\u003e\n\u003cp data-end=\"2019\" data-start=\"1922\"\u003e\u003cstrong data-end=\"1944\" data-start=\"1922\"\u003eLightweight build:\u003c\/strong\u003e Weighs just 10 ounces, making handling and installation more convenient.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2165\" data-start=\"2021\"\u003eThe ST9120C4040 delivers the reliability and control precision required for maintaining efficient furnace blower operation in heating systems.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":50490823278890,"sku":"ST9120C4040","price":257.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/s-l1600_6337da55-c58c-4bb3-952b-47c71e4f29f1.webp?v=1755082010","url":"https:\/\/iqelectro.com\/products\/honeywell-st9120c4040-integrated-furnace-fan-control-board-for-gas-heating-systems","provider":"IQElectro","version":"1.0","type":"link"}