{"product_id":"icp-control-board-kit-for-rhs243l0ba0aaaa-24v-defrost-control-ships-today","title":"ICP Control Board Kit for RHS243L0BA0AAAA — 24V Defrost Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM Control Board Kit (Part No. 1183618) is the electronic brain for the ICP \/ Tempstar \/ Heil RHS243L0BA0AAAA heat pump. It manages the defrost cycle, monitors temperature and pressure inputs, and sequences the compressor contactor and reversing valve on a 24V control circuit. When this board fails, the system may run continuously in defrost, fail to switch between heating and cooling, short-cycle the compressor, or stop responding to the thermostat entirely. Replacing the board with a factory kit restores correct timing and protective logic without guesswork.\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 Board Kit (Defrost \/ Sequencing)\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\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDesigned for the ICP RHS243L0BA0AAAA heat pump and shared across the RHS243 platform sold under the ICP, Tempstar, Heil, and Comfortmaker brands. Always confirm your unit's data-plate model and the existing board's part number before ordering.\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 control-panel service cover on the condensing unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and connector position on the old board before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the low-voltage harness and line connections, release the board standoffs, and lift out the failed board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on the standoffs and reconnect every wire exactly per your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating and a cooling call, and confirm a normal defrost cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUnit stuck in defrost or never defrosts\u003c\/li\u003e\n\u003cli\u003eNo response to thermostat heat\/cool calls\u003c\/li\u003e\n\u003cli\u003eCompressor short-cycling or failing to start\u003c\/li\u003e\n\u003cli\u003eVisible scorching, swollen capacitors, or burnt relays on the board\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":63021836534131,"sku":"1183618","price":219.64,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047486439795,"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-furnace-1183618_cbaf2b4f-7eb2-42b5-8834-515cc62c673d.jpg?v=1782886191","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rhs243l0ba0aaaa-24v-defrost-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}