{"product_id":"icp-defrost-control-board-for-wch460gka210-heat-pump-defrost-timer-ships-today-1","title":"ICP Defrost Control Board for WCH460GKA210 — 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 WCH460GKA210 heat pump. The defrost board governs the outdoor unit's defrost cycle — it watches coil temperature and accumulated run time, then commands the reversing valve and outdoor fan to melt frost off the condenser coil during heating operation. It also handles compressor anti-short-cycle timing and routes the 24V signals between the thermostat, contactor, and reversing valve. A failed defrost board commonly causes the coil to ice solid, the compressor to lock out, or the unit to run without ever defrosting — problems that look like a refrigerant fault but are really 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\u003eWCH460GKA210\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\u003eDirect OEM fit for the ICP\/Tempstar\/Heil WCH460GKA210 heat pump and shared ICP-family chassis (Comfortmaker, Arcoaire, KeepRite). 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 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":63027250528627,"sku":"1173636","price":161.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047492534643,"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_379ba615-4a63-43c4-90da-ee804c296ec9.jpg?v=1782886523","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-wch460gka210-heat-pump-defrost-timer-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}