{"product_id":"icp-furnace-control-board-kit-for-rgs303sffa0aaaa-oem-replacement-ships-today","title":"ICP Furnace Control Board Kit for RGS303SFFA0AAAA — OEM Replacement | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM control board kit (ICP part number 1183618) for the ICP\/Tempstar\/Heil RGS303SFFA0AAAA gas furnace. The integrated furnace control board is the brain of the system — it manages the ignition sequence, monitors safety inputs from the pressure switch, limit, and flame sensor, and times the inducer and blower on and off. When the board fails the furnace may not respond to the thermostat, lock out repeatedly, leave the blower running, or throw inconsistent diagnostic fault codes. This kit includes the replacement board for a clean, reliable restoration of full furnace operation.\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\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eIgnition, Safety \u0026amp; Blower Timing Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eA direct-fit replacement for the ICP\/Tempstar\/Heil RGS303SFFA0AAAA. ICP, Tempstar, Heil, and Comfortmaker furnaces share control platforms, so this board kit also services many sibling RGS-series units. Confirm your existing board carries part number 1183618 before ordering, and match the connector layout to your unit.\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 control compartment panel to expose the existing board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire harness and plug location on the old board before disconnecting — this is critical for a control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug each connector, release the mounting screws or standoffs, and lift the old board out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board and reconnect every harness to its matching plug per your photos. Set any DIP switches or jumpers to match the original.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and run a full heat cycle, confirming 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 is completely unresponsive to thermostat calls\u003c\/li\u003e\n\u003cli\u003eBlower runs continuously or fails to start on a heat call\u003c\/li\u003e\n\u003cli\u003eRepeated lockouts or erratic, inconsistent diagnostic fault codes\u003c\/li\u003e\n\u003cli\u003eVisible burn marks, corrosion, or a blown fuse 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":63027271172467,"sku":"1183618","price":246.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047570162035,"sku":"1183618-GEN","price":189.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1183618_254be88e-342b-4079-a0a4-d76a097c4488.jpg?v=1782889724","url":"https:\/\/nationalhvacparts.com\/products\/icp-furnace-control-board-kit-for-rgs303sffa0aaaa-oem-replacement-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}