{"product_id":"icp-control-board-kit-for-rgs243lefa0aaaa-furnace-integrated-control-ships-today","title":"ICP Control Board Kit for RGS243LEFA0AAAA — Furnace Integrated Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM Integrated Furnace Control Board Kit (part number 1183618) is the electronic brain of the ICP RGS243LEFA0AAAA gas furnace. It manages the entire heating sequence — igniter warm-up, gas valve timing, blower on\/off delays, flame sensing, and built-in safety lockouts. When this board fails, the furnace typically stops responding to thermostat calls, flashes diagnostic LED fault codes, short-cycles, or fails to energize the igniter and blower. Replacing a failed control board restores reliable, safe furnace operation. This is a genuine OEM kit, not an aftermarket substitute, so connector pin-outs, relay ratings, and ignition timing match factory specifications exactly.\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 \/ Heil \/ Tempstar \/ Comfortmaker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eIgnition, gas valve, blower \u0026amp; flame-sense control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered as the direct OEM replacement control board for the ICP RGS243LEFA0AAAA gas furnace. This kit also services many closely related Heil, Tempstar, and Comfortmaker RGS-series furnaces that share the same control platform. Always confirm the printed part number on your existing board reads 1183618 before installing.\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; verify zero voltage with a multimeter and shut off the gas supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace blower-compartment 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 wiring harnesses, release 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 1183618 board, then reconnect each harness exactly per your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore gas and power, run a heat cycle, and confirm igniter, gas valve, flame sense, and blower all sequence correctly 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 does not respond to thermostat heat calls.\u003c\/li\u003e\n\u003cli\u003eDiagnostic LED flashing fault codes or no LED at all.\u003c\/li\u003e\n\u003cli\u003eIgniter or blower fails to energize during the heat sequence.\u003c\/li\u003e\n\u003cli\u003eFurnace short-cycles or locks out after a few minutes.\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":63027288506739,"sku":"1183618","price":214.5,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047476904307,"sku":"1183618-GEN","price":165.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1183618_45de48be-5c35-4b03-bc53-8bd3a0b4a6d4.jpg?v=1782885855","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rgs243lefa0aaaa-furnace-integrated-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}