{"product_id":"icp-control-board-for-rhs183s0aa0aaaa-24v-defrost-board-kit-ships-today","title":"ICP Control Board for RHS183S0AA0AAAA — 24V Defrost Board Kit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM control board kit (part 1183618) is the electronic brain of your ICP RHS183S0AA0AAAA heat pump. It manages the defrost cycle, compressor timing, reversing valve operation, and safety interlocks based on inputs from the 24V thermostat and the outdoor coil sensor. When this board fails, the unit may stop defrosting and ice over in heat mode, fail to switch between heating and cooling, short-cycle the compressor, or go completely unresponsive. The kit includes the board and required mounting hardware so you can restore full system control in a single service call. Because the board coordinates nearly every function of the outdoor unit, a marginal board can produce confusing, intermittent symptoms that mimic compressor, contactor, or thermostat faults.\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\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\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 timing, reversing valve, safeties\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Heil \/ Tempstar\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 RHS183S0AA0AAAA heat pump and used across matching Heil, Tempstar, Comfortmaker, and Day \u0026amp; Night R-410A heat pump platforms. Verify the board layout, connector count, and part number against your existing board before installing.\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 before touching the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control panel cover to reach the mounted board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every plug, wire color, and terminal location before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the connectors, release the standoffs or screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on its standoffs and reconnect each harness exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating and cooling cycle, and confirm proper defrost and changeover operation.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over because defrost never initiates.\u003c\/li\u003e\n\u003cli\u003eNo switching between heating and cooling modes.\u003c\/li\u003e\n\u003cli\u003eCompressor short-cycles or will not start.\u003c\/li\u003e\n\u003cli\u003eUnit is completely unresponsive to thermostat calls.\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":63021839417715,"sku":"1183618","price":218.4,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047464911219,"sku":"1183618-GEN","price":168.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1183618_0cc1626f-3166-4422-b2d5-8e4a3ecfcac1.jpg?v=1782885402","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-for-rhs183s0aa0aaaa-24v-defrost-board-kit-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}