{"product_id":"icp-control-board-for-rgs243ltaa0aaaa-oem-furnace-kit-1183618-ships-today","title":"ICP Control Board for RGS243LTAA0AAAA — OEM Furnace Kit 1183618 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe OEM 1183618 control board kit is the integrated furnace control (IFC) module for the ICP \/ Tempstar \/ Heil RGS243LTAA0AAAA gas furnace. This board is the brain of the furnace: it sequences the inducer motor, hot surface igniter, gas valve, and blower motor while monitoring the pressure switch, flame sensor, and limit switches. It also drives the 24V control circuit and provides the diagnostic LED fault codes used during troubleshooting. When this board fails, the furnace typically will not start, locks out after a few ignition attempts, runs the blower continuously, or shuts down on a false safety fault. A cracked relay, burned terminal, or failed microprocessor on the original board are the most common reasons for replacement.\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 (KIT CONTROL BOARD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eIntegrated Furnace Control Board\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\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\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\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 a direct OEM fit for the ICP RGS243LTAA0AAAA furnace and other ICP-family models that originally shipped with kit 1183618. Always verify your existing board's part number against the OEM number before ordering to confirm an exact match.\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace blower-compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and connector on the existing board before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and unplug each harness, 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 1183618 board, reconnect each harness exactly per your photos, and set any jumpers\/DIP switches to match.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and run a full heat cycle; confirm proper ignition, blower timing, and no fault codes on the diagnostic LED.\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 repeatedly locks out\u003c\/li\u003e\n\u003cli\u003eBlower runs continuously or fails to start\u003c\/li\u003e\n\u003cli\u003eDiagnostic LED is dark, frozen, or flashing a hard fault\u003c\/li\u003e\n\u003cli\u003eVisible burnt traces, melted relays, or scorched terminals on the old 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":63027286999411,"sku":"1183618","price":245.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047464059251,"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_e67ff60d-c133-47a1-8b02-8814ac9653bd.jpg?v=1782885365","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-for-rgs243ltaa0aaaa-oem-furnace-kit-1183618-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}