{"product_id":"icp-defrost-control-board-for-wch5184gka100-heat-pump-defrost-timer-ships-today-1","title":"ICP Defrost Control Board for WCH5184GKA100 — Heat Pump Defrost Timer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is the OEM defrost control board (part #1173636) for the ICP\/Tempstar\/Heil WCH5184GKA100 heat pump. The defrost board is the brain of the outdoor unit's defrost cycle — it monitors coil temperature and run time, then commands the reversing valve and outdoor fan to clear frost buildup from the condenser coil during heating season. It also manages compressor anti-short-cycle timing and relays low-voltage 24V calls between the thermostat, contactor, and reversing valve. When this board fails, the heat pump can ice over completely, lock out the compressor, or run continuously without ever defrosting — symptoms that mimic a refrigerant or compressor problem but are actually a controls failure.\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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1173636\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDemand\/Timed Defrost 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\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eWCH5184GKA100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDesigned as a direct OEM fit for the ICP\/Tempstar\/Heil WCH5184GKA100 heat pump and shared chassis variants across the ICP family (Comfortmaker, Arcoaire, KeepRite). Always confirm the printed part number on your existing board before ordering.\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 at the board terminals with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit's control-panel access cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and connector position before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and unplug the low-voltage and line connectors, release the board's mounting 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 every wire to match your photo exactly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, initiate a heating call, and verify the defrost cycle, reversing valve, and fan 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 and never clears during heating\u003c\/li\u003e\n\u003cli\u003eCompressor won't start or short-cycles on a heat call\u003c\/li\u003e\n\u003cli\u003eDefrost cycle runs constantly or not at all\u003c\/li\u003e\n\u003cli\u003eNo 24V output to the contactor or reversing valve\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. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027250332019,"sku":"1173636","price":161.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047492600179,"sku":"1173636-GEN","price":124.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1173636_b6d5c830-fe53-4a9a-887f-3c4a8d8a1312.jpg?v=1782886528","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-wch5184gka100-heat-pump-defrost-timer-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}