{"product_id":"icp-control-board-kit-for-rhs243h0ca0aaaa-oem-defrost-heat-pump-board-ships-today","title":"ICP Control Board Kit for RHS243H0CA0AAAA – OEM Defrost\/Heat Pump Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control board kit (P\/N 1183618) is the electronic brain of your ICP \/ Heil \/ Tempstar RHS243H0CA0AAAA heat pump. It manages the defrost cycle, compressor and reversing-valve timing, fan sequencing, and the safety lockouts that protect the system. The board reads the defrost thermostat and timer settings to decide when to melt frost off the outdoor coil during heating, then returns the unit to normal operation. Because it carries 24V control logic and switches relays under load, the board is vulnerable to power surges, lightning, moisture intrusion, and simple age. Common failure symptoms include a heat pump that won't switch between heating and cooling, no defrost (coil iced over), erratic compressor cycling, blank or no diagnostic LED, or burned\/scorched traces on the board itself.\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\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e1183618 (Kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDefrost \/ Heat Pump Control 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\u003e24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eDefrost, compressor \u0026amp; reversing-valve sequencing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eRHS243H0CA0AAAA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered for the ICP \/ Heil \/ Tempstar RHS243H0CA0AAAA heat pump. This is a factory kit, so it includes the board and the hardware needed for a direct replacement. Match the OEM part number on your existing board before ordering — control boards vary by model and revision.\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e – Remove the condenser control-box cover to reach the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph every wire and connector position before unplugging anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Unplug the harnesses, release the board standoffs\/screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Seat the new board on the standoffs and reconnect each harness exactly per your photo; set any dip switches\/jumpers to match the original.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power, run a heating and cooling call, and confirm proper defrost and changeover operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor coil icing over with no defrost cycle\u003c\/li\u003e\n\u003cli\u003eUnit won't switch between heat and cool\u003c\/li\u003e\n\u003cli\u003eErratic or short compressor cycling\u003c\/li\u003e\n\u003cli\u003eVisible burn marks, corrosion, or a dead diagnostic LED\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":63021836894579,"sku":"1183618","price":219.64,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047486210419,"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_61458a72-0649-413a-9035-8d642da72def.jpg?v=1782886181","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rhs243h0ca0aaaa-oem-defrost-heat-pump-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}