{"product_id":"icp-control-board-kit-for-rgs303lfea0aaaa-oem-furnace-control-1183618-ships-today","title":"ICP Control Board Kit for RGS303LFEA0AAAA — OEM Furnace Control 1183618 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM control board kit (part number 1183618) for the ICP\/Tempstar\/Heil RGS303LFEA0AAAA gas furnace. The integrated furnace control board governs the entire heat cycle — ignition timing, inducer and blower operation, safety limit monitoring, and diagnostic fault reporting. When it fails, the furnace may not respond to a heat call, may lock out after failed ignition attempts, may run the blower nonstop, or may flash an error code on its diagnostic LED. As the central controller, a failed board is among the most common causes of a furnace that stops heating. This kit ships complete and ready to install.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\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 \/ Comfortmaker)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eRGS303LFEA0AAAA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eGas Furnace\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned as a direct OEM fit for the ICP\/Tempstar\/Heil RGS303LFEA0AAAA gas furnace. ICP-family brands (Heil, Tempstar, Comfortmaker, Arcoaire, KeepRite) share many components, so this board (part 1183618) may also service related RGS-series models — always verify your existing board part number before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\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 at the board terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace front service panel to expose the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and connector position before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the molex harnesses and low-voltage leads, release the board mounting standoffs\/screws, and lift the old board out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 1183618 board on the standoffs and reconnect every harness exactly per your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, initiate a heat call, and confirm proper ignition, blower, and inducer operation with no fault codes.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace will not ignite or has no response to a thermostat call for heat.\u003c\/li\u003e\n\u003cli\u003eBlower or inducer motor runs continuously or fails to start.\u003c\/li\u003e\n\u003cli\u003eRepeated ignition lockouts or a flashing diagnostic fault code on the board LED.\u003c\/li\u003e\n\u003cli\u003eVisible burn marks, corrosion, or cracked solder\/relays on the board.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\n\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":63027273793907,"sku":"1183618","price":245.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047478706547,"sku":"1183618-GEN","price":189.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1183618_50de8bfa-4401-4925-bb7e-4c8d66a65970.jpg?v=1782885918","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rgs303lfea0aaaa-oem-furnace-control-1183618-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}