{"product_id":"icp-control-board-kit-for-rhs240s0ca0aaaa-24v-heat-pump-defrost-board-ships-today","title":"ICP Control Board Kit for RHS240S0CA0AAAA — 24V Heat Pump Defrost Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM control board kit (part number 1183618) is the electronic brain of your ICP\/Heil\/Tempstar RHS240S0CA0AAAA heat pump. It manages the defrost cycle, reversing valve switching, compressor timing, and safety lockouts based on inputs from the thermostat and outdoor temperature and coil sensors. On a heat pump, this board is what decides when to reverse the refrigerant flow to melt frost off the outdoor coil and when to bring the unit back into heating or cooling. When it fails, you typically lose proper defrost — leading to an iced-over outdoor coil — or lose compressor and reversing valve control entirely. The kit ships with the board and the mounting hardware needed for a clean OEM replacement.\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\u003eControl \/ Defrost Board Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP (Heil \/ Tempstar \/ Comfortmaker)\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump Defrost \u0026amp; Compressor Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDesigned specifically for the ICP\/Heil\/Tempstar RHS240S0CA0AAAA heat pump and shared across compatible RHS-series outdoor units. Confirm the board part number stamped on your existing board matches 1183618 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 disconnect and breaker, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service panel to reach the control box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and connector on the existing board, including sensor leads and DIP switch positions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect all connectors and unscrew or unclip the old board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, set any DIP switches to match the originals, and reconnect each wire per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating and cooling call, and verify proper compressor, reversing valve, and defrost operation.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over because the defrost cycle never initiates\u003c\/li\u003e\n\u003cli\u003eCompressor or reversing valve won't energize on a call\u003c\/li\u003e\n\u003cli\u003eVisible scorch marks, burned traces, or a blown relay on the board\u003c\/li\u003e\n\u003cli\u003eErratic short-cycling or unit ignoring thermostat commands\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":63021837189491,"sku":"1183618","price":219.64,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047485260147,"sku":"1183618-GEN","price":168.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1183618_673a8769-3303-40e6-91a3-83f5a9f2ffcb.jpg?v=1782886168","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rhs240s0ca0aaaa-24v-heat-pump-defrost-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}