{"product_id":"icp-furnace-control-board-kit-for-rgs120hsaa0aaa-oem-circuit-board-ships-today","title":"ICP Furnace Control Board Kit for RGS120HSAA0AAA — OEM Circuit Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis genuine OEM control board kit (PN 1183618) is the integrated furnace control (IFC) brain of the ICP\/Tempstar\/Heil RGS120HSAA0AAA gas furnace. It sequences the entire heating cycle — verifying the pressure switch, energizing the hot surface igniter, opening the gas valve, proving flame, and timing the blower on and off delays — while monitoring safety limits and flashing diagnostic fault codes. When a control board fails from power surges, corrosion, burned relays, or cracked solder joints, the furnace may not start, may short-cycle, leave the blower running continuously, or throw erratic fault codes. Installing a new OEM board restores correct ignition sequencing, blower control, and safety supervision.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1183618\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eIntegrated furnace control board kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Tempstar \/ Heil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunctions\u003c\/td\u003e\n\u003ctd\u003eIgnition sequencing, blower timing, safety \u0026amp; diagnostics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eGas furnace control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered for the ICP\/Tempstar\/Heil RGS120HSAA0AAA gas furnace and related ICP-family models specifying this control board kit. Match the board's part number and connector layout to your original before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace blower\/control compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every connector and wire location on the old board before unplugging anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug all harness connectors, remove the mounting screws\/standoffs, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board and reconnect each harness to the matching terminal per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a full heat cycle, and confirm proper ignition, blower timing, and no fault codes.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFurnace won't start or has no response to a heat call.\u003c\/li\u003e\n\u003cli\u003eShort-cycling or blower that runs continuously.\u003c\/li\u003e\n\u003cli\u003eErratic or repeating diagnostic fault codes.\u003c\/li\u003e\n\u003cli\u003eVisible burn marks, corrosion, or cracked solder on the board.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\u003cp\u003eShips same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027577225587,"sku":"1183618","price":207.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047551517043,"sku":"1183618-GEN","price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1183618_102d128b-c951-4096-9a78-07ec21ac6cf6.jpg?v=1782888946","url":"https:\/\/nationalhvacparts.com\/products\/icp-furnace-control-board-kit-for-rgs120hsaa0aaa-oem-circuit-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}