{"product_id":"icp-control-board-kit-for-rhh090s0ba0aaaa-oem-defrost-board-ships-today","title":"ICP Control Board Kit for RHH090S0BA0AAAA — OEM Defrost Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM control board kit (part number 1183618) for the ICP\/Tempstar\/Heil RHH090S0BA0AAAA heat pump. The control board is the brain of the outdoor unit — it manages the defrost cycle, sequences the compressor and reversing valve, switches the condenser fan, and coordinates the 24V signals between the thermostat, contactor, and accessories. Supplied as a complete kit, it includes the board and the mounting hardware needed for a direct replacement. When a control board fails, the symptoms are often intermittent and confusing: the unit may run constantly in defrost, never defrost and ice over, fail to switch between heating and cooling, or stop responding to thermostat calls entirely. Replacing the board with the correct OEM kit restores proper sequencing and protects the compressor from short-cycling.\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\u003eControl Board Kit (Defrost\/Control)\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\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncludes\u003c\/td\u003e\n\u003ctd\u003eBoard + Mounting Hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM 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-fit OEM replacement for the ICP\/Tempstar\/Heil RHH090S0BA0AAAA and the related RHH090S0AA0AAAA heat pump models, plus other ICP-family outdoor units that originally used the 1183618 control board kit. Verify the original board part number against the unit's wiring diagram or rating plate 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 disconnect and breaker, then verify zero voltage with a multimeter before touching the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser control-panel cover to expose the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every connector and wire position; note the defrost timer pin setting if applicable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the harness connectors, release the board standoffs\/screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, transfer the defrost timing setting, and reconnect every harness exactly per your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating and cooling call, and confirm correct compressor, fan, reversing valve, and defrost operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeat pump stuck in or never entering defrost; outdoor coil icing over.\u003c\/li\u003e\n\u003cli\u003eUnit ignores thermostat calls or short-cycles the compressor.\u003c\/li\u003e\n\u003cli\u003eReversing valve fails to switch between heating and cooling.\u003c\/li\u003e\n\u003cli\u003eVisible burn marks, corrosion, or failed relays 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. National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027262751091,"sku":"1183618","price":279.5,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047482081651,"sku":"1183618-GEN","price":215.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1183618_3901d8ce-909b-48dc-a263-e0208cbe6a61.jpg?v=1782886043","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rhh090s0ba0aaaa-oem-defrost-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}