{"product_id":"icp-control-board-kit-for-rhh036s0ba0aaaa-heat-pump-defrost-board-ships-today","title":"ICP Control Board Kit for RHH036S0BA0AAAA — Heat Pump Defrost Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM control board kit (part number 1183618) is the electronic brain of the ICP\/Tempstar\/Heil RHH036S0BA0AAAA heat pump. The board manages the defrost cycle, compressor and fan sequencing, reversing-valve switching, and the 24-volt safety circuit. It reads the defrost thermostat and timer logic to decide when to reverse the system and melt frost off the outdoor coil, then returns the unit to normal operation. Because every cooling and heating call routes through this board, a failure usually shows up as a unit that will not run at all, a heat pump that ices over and never defrosts, or erratic compressor and fan behavior. Replacing the board with the correct OEM kit restores proper sequencing and protects the compressor from short-cycling.\u003c\/p\u003e\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\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\u003eDefrost \/ Control Board Kit\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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eDefrost, sequencing, reversing-valve control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eRHH036S0BA0AAAA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned for the ICP\/Tempstar\/Heil RHH036S0BA0AAAA heat pump and the related ICP-family outdoor units that share this defrost control kit. Confirm the existing board's part number and connector layout before ordering, as control kits are model-specific.\u003c\/p\u003e\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 outdoor unit's electrical service panel to expose the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire harness, plug, and terminal position before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the connectors, release the board's mounting standoffs or screws, and lift it out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on the standoffs, reconnect each harness exactly per your photos, and verify the defrost sensor and reversing-valve leads are landed correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a cooling and a heating call, and confirm proper compressor, fan, and defrost operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeat pump ices over and never initiates a defrost cycle.\u003c\/li\u003e\n\u003cli\u003eOutdoor unit is completely dead with 24V present at the board.\u003c\/li\u003e\n\u003cli\u003eCompressor or fan short-cycles or runs erratically.\u003c\/li\u003e\n\u003cli\u003eVisible burnt traces, scorched relays, or a blown fuse on the board.\u003c\/li\u003e\n\u003c\/ul\u003e\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":63027266093427,"sku":"1183618","price":214.5,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047480148339,"sku":"1183618-GEN","price":165.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1183618_43f71799-a110-4a7d-a19e-9843e336382d.jpg?v=1782885962","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-kit-for-rhh036s0ba0aaaa-heat-pump-defrost-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}