{"product_id":"icp-defrost-control-board-kit-for-rhs181h0ca0aaaa-heat-pump-control-ships-today","title":"ICP Defrost Control Board Kit for RHS181H0CA0AAAA — Heat Pump Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM \u003cstrong\u003econtrol board kit\u003c\/strong\u003e (part 1183618) is the brain of the ICP \/ Tempstar \/ Heil \u003cstrong\u003eRHS181H0CA0AAAA\u003c\/strong\u003e heat pump. The defrost control board monitors outdoor coil temperature and run time, then commands the reversing valve and condenser fan through a defrost cycle to clear frost from the outdoor coil in heating mode. It also coordinates the compressor contactor and 24V control logic. A failed board causes erratic operation, a coil that ices over, a unit stuck in defrost, or no outdoor unit response at all. The kit ships with the OEM board and mounting hardware for a direct 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\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e1183618 (Control Board Kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDefrost \/ Heat Pump Control Board\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\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eBuilt for the ICP-family RHS181H0CA0AAAA 1.5-ton heat pump and equivalent Tempstar, Heil, Comfortmaker, and Arcoaire units. Match the OEM kit number against your existing board before ordering, as defrost timing and pin layouts vary by chassis.\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 outdoor disconnect and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel to reach the control box and mounted board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every connector, the defrost timing jumper position, and all wire colors before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the connectors, release the board standoffs or screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, set the defrost timing jumper to match the original, and reseat every connector per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating cycle, and confirm the board initiates and terminates defrost correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over and won't defrost\u003c\/li\u003e\n\u003cli\u003eUnit stuck running defrost continuously\u003c\/li\u003e\n\u003cli\u003eNo response from the outdoor unit on a heat call\u003c\/li\u003e\n\u003cli\u003eErratic compressor or reversing-valve switching\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\u003cp\u003eShips same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63021844824435,"sku":"1183618","price":194.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047507640691,"sku":"1183618-GEN","price":149.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1183618_b6d6c20f-74ef-42e6-a6f8-7c2cdc741e7f.jpg?v=1782887407","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-kit-for-rhs181h0ca0aaaa-heat-pump-control-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}