{"product_id":"icp-control-board-kit-for-rgs300hefa0aaaa-furnace-ignition-control-ships-today","title":"ICP Control Board Kit for RGS300HEFA0AAAA — Furnace Ignition Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control board kit (part 1183618) is the brain of your ICP RGS300HEFA0AAAA gas furnace. It sequences the entire heat cycle — proving the inducer, energizing the igniter, opening the gas valve, monitoring flame, and timing blower on\/off — while watching limit and pressure safeties throughout. The kit ships with the board and the hardware needed for a clean swap. Board failures show up as a furnace that does nothing on a call for heat, blinking diagnostic LED fault codes, the blower running constantly, or intermittent operation. Power surges, moisture, and aging relays are the typical culprits.\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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eIgnition, Blower \u0026amp; Safety Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\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\u003eDirect OEM fit for the ICP \/ Tempstar \/ Heil RGS300HEFA0AAAA. Match the OEM kit number to your unit's parts list — control boards are model-specific, so verify the part number before ordering.\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 breaker and switch, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every connector and wire position before disconnecting; boards have many similar plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug each harness, release the board standoffs or screws, and lift the old board out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board, then reconnect each harness to the matching terminal per your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a full heat cycle, and confirm 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\u003eNo response from the furnace on a call for heat.\u003c\/li\u003e\n\u003cli\u003eDiagnostic LED flashing hard-fault codes.\u003c\/li\u003e\n\u003cli\u003eBlower runs constantly or fails to start.\u003c\/li\u003e\n\u003cli\u003eIntermittent ignition, lockouts, or scorched spots 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":63027282346355,"sku":"1183618","price":258.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047477821811,"sku":"1183618-GEN","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1183618_3a5aa9d0-d74c-4afa-b098-3094b2bad832.jpg?v=1782885880","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rgs300hefa0aaaa-furnace-ignition-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}