{"product_id":"icp-furnace-control-board-for-rgs303hsaa0aaaa-oem-integrated-ignition-control-kit-ships-today","title":"ICP Furnace Control Board for RGS303HSAA0AAAA – OEM Integrated Ignition Control Kit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM integrated furnace control board kit, part number 1183618, is the brain of the ICP \/ Tempstar \/ Heil RGS303HSAA0AAAA gas furnace. It manages the entire heat sequence — inducer start, pressure-switch proving, igniter warm-up, gas-valve timing, flame sensing, and blower on\/off delays — and houses the diagnostic LED that reports fault codes. Control boards typically fail from voltage surges, cracked solder joints, burned relays, or corroded connectors. Symptoms include a completely dead furnace, no response to thermostat calls, the blower or inducer running continuously, no spark\/igniter signal, or erratic short-cycling with no stored fault code. This factory kit restores correct, code-compliant sequencing and protects downstream components.\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)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLine Voltage\u003c\/td\u003e\n\u003ctd\u003e120V\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 Ignition \u0026amp; Blower Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM Direct 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\u003eDesigned for the ICP \/ Tempstar \/ Heil RGS303HSAA0AAAA gas furnace and related models that specify OEM control board kit 1183618. Match the board's connector layout and part number to your existing unit 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 switch and breaker; verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e – Remove the furnace control\/blower-compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph every wire and connector on the old board before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Unplug all harnesses, remove the mounting screws, and lift out the failed board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Mount the new board, transfer connectors one at a time, and reconnect exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power, call for heat, and verify full sequence: inducer, igniter, burners, and blower.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace is completely dead or unresponsive to the thermostat.\u003c\/li\u003e\n\u003cli\u003eInducer or blower runs continuously and won't shut off.\u003c\/li\u003e\n\u003cli\u003eNo igniter or gas-valve signal during a heat call.\u003c\/li\u003e\n\u003cli\u003eErratic short-cycling, burnt smell, or visibly scorched relays\/traces 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":63027275170163,"sku":"1183618","price":227.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047527989619,"sku":"1183618-GEN","price":174.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1183618_e29ac44f-50c5-40de-9f0e-0b7535b85749.jpg?v=1782888299","url":"https:\/\/nationalhvacparts.com\/products\/icp-furnace-control-board-for-rgs303hsaa0aaaa-oem-integrated-ignition-control-kit-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}