{"product_id":"icp-control-board-for-rgs303heea0aaaa-furnace-control-board-kit-ships-today","title":"ICP Control Board for RGS303HEEA0AAAA — Furnace Control Board Kit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM control board kit (part 1183618) is the brain of the ICP \/ Tempstar \/ Heil RGS303HEEA0AAAA gas furnace. The integrated furnace control manages the entire heat sequence — energizing the inducer, proving pressure, firing the igniter, opening the gas valve, monitoring flame, and timing the blower on and off. It also runs safety lockouts and flashes diagnostic fault codes. When the board fails, the furnace may be completely dead, stuck in lockout, blow cold air, or behave erratically. The kit includes the matched board and mounting hardware for a clean OEM replacement, restoring proper sequencing and full diagnostic capability.\u003c\/p\u003e\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\u003eOEM Part 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\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eGas Furnace Sequencing \u0026amp; Safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM Direct Replacement Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDirect-fit replacement for the ICP, Tempstar, Heil, and Comfortmaker RGS303HEEA0AAAA furnace and related RGS303 series units using the same integrated control. Verify the board layout, connectors, and part number against your original before ordering.\u003c\/p\u003e\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 control\/blower compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every plug, terminal, and wire color on the old board before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug each harness and the line\/24V connections, then unscrew the failed board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, transfer any jumpers\/links, and reconnect every harness exactly per your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, call for heat, and confirm the full inducer-igniter-gas-blower sequence and clear diagnostic LED.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace is completely unresponsive with no diagnostic LED\u003c\/li\u003e\n\u003cli\u003eRepeated lockouts or erratic, out-of-sequence operation\u003c\/li\u003e\n\u003cli\u003eBlower or inducer runs continuously or never starts\u003c\/li\u003e\n\u003cli\u003eBurnt spots, scorched traces, or relays buzzing on the board\u003c\/li\u003e\n\u003c\/ul\u003e\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":63027276153203,"sku":"1183618","price":175.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047464288627,"sku":"1183618-GEN","price":134.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1183618_611160f6-8355-490f-9698-d0b765482b43.jpg?v=1782885375","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-for-rgs303heea0aaaa-furnace-control-board-kit-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}