{"product_id":"icp-furnace-control-board-kit-for-rgs120lfab0aaa-oem-ignition-control-ships-today","title":"ICP Furnace Control Board Kit for RGS120LFAB0AAA — OEM Ignition Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is the genuine OEM furnace control board kit (part 1183618) for the ICP\/Tempstar\/Heil RGS120LFAB0AAA gas furnace. The integrated control board is the brain of the furnace: it sequences the entire heating cycle — energizing the inducer, proving the pressure switch, powering the hot surface igniter, opening the gas valve, monitoring the flame sensor, and timing the blower on and off. It also enforces the safety circuit, locking out the furnace if any limit, rollout, or flame condition is unsafe. Because the board ties every component together, a failed board can mimic many other faults. Common symptoms include a completely dead furnace with no response to a heat call, an igniter or inducer that never energizes, blower timing that runs constantly or not at all, error codes flashing on the diagnostic LED, and intermittent no-heat that comes and goes with heat or vibration. The kit includes the replacement board ready for field installation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\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 sequencing, blower timing, safety control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostics\u003c\/td\u003e\n\u003ctd\u003eOn-board LED fault codes\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\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered for the ICP RGS120LFAB0AAA gas furnace and related Tempstar, Heil, Comfortmaker, and ICP models that use this integrated control. Match the board part number and connector layout to your existing board before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\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 panel to reach the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire harness and connector, or transfer leads one at a time to avoid mistakes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug all harnesses, remove the board mounting screws or standoffs, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, reseat each connector in its matching plug per your photos, and confirm all are fully latched.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a full heat cycle, and verify proper ignition, flame sensing, and blower timing with no fault codes.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFurnace is completely unresponsive to a heat call\u003c\/li\u003e\n\u003cli\u003eIgniter, inducer, or blower never energizes in sequence\u003c\/li\u003e\n\u003cli\u003eDiagnostic LED flashing a board or sequence fault code\u003c\/li\u003e\n\u003cli\u003eIntermittent no-heat that changes with vibration or temperature\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\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":63027548389747,"sku":"1183618","price":220.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047552663923,"sku":"1183618-GEN","price":169.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1183618_2b8711f8-496a-4cc5-bc88-c7c7b0c6596d.jpg?v=1782888989","url":"https:\/\/nationalhvacparts.com\/products\/icp-furnace-control-board-kit-for-rgs120lfab0aaa-oem-ignition-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}