{"product_id":"icp-control-board-kit-for-rhx048k0xa0aaa-heat-pump-defrost-board-ships-today","title":"ICP Control Board Kit for RHX048K0XA0AAA — Heat Pump Defrost Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control board kit (part number 1183618) is the electronic brain of the ICP RHX048K0XA0AAA heat pump. Operating on the 24-volt control circuit, the board manages defrost timing and termination, energizes the reversing valve and contactor, sequences the outdoor fan, and provides safety lockouts that protect the compressor from short-cycling and pressure faults. Supplied as a complete kit with the mounting hardware and connector harness needed for a clean swap, it restores reliable heat-pump operation when the original board has failed. Common failure symptoms include no outdoor unit operation, the system stuck in or out of defrost, ice buildup on the coil in heating mode, a fan that runs constantly or not at all, and erratic switching between heating and cooling. Board failures are frequently caused by power surges, lightning, moisture intrusion, and overheated relays.\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDefrost \/ Timing Control Board Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Tempstar \/ Heil \/ 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\u003eIncludes\u003c\/td\u003e\n\u003ctd\u003eBoard, mounting hardware, connectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump Outdoor Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eA direct OEM replacement kit for the ICP RHX048K0XA0AAA heat pump and the matching Tempstar, Heil, and Comfortmaker outdoor units that use this defrost control platform. Verify the part number on the existing board 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 outdoor 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 unit's electrical control panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and connector on the old board before removing anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the harness connectors, remove the mounting screws or standoffs, and lift out the failed board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board with the supplied hardware and reconnect each plug to match your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating and a cooling cycle, and confirm proper defrost and reversing-valve 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 unit is completely unresponsive on a call for heat or cool.\u003c\/li\u003e\n\u003cli\u003eHeavy ice or frost on the outdoor coil because defrost never initiates.\u003c\/li\u003e\n\u003cli\u003eSystem stuck in defrost or constantly switching modes.\u003c\/li\u003e\n\u003cli\u003eBurnt smell, scorched relays, or visible damage 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. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63021835747699,"sku":"1183618","price":219.64,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047486898547,"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_991e3db4-2dc8-41be-a16a-d14de9e68e62.jpg?v=1782886209","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rhx048k0xa0aaa-heat-pump-defrost-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}