{"product_id":"icp-defrost-control-board-for-wch5184gka200-24v-heat-pump-ships-today-1","title":"ICP Defrost Control Board for WCH5184GKA200 — 24V Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eOEM part 1173636 is the genuine defrost control board for the ICP \/ Tempstar \/ Heil WCH5184GKA200 heat pump. This board is the brain of heat-pump operation: it monitors the outdoor coil temperature sensor, runs the defrost timer logic, and decides when to reverse the system into a defrost cycle to melt frost off the outdoor coil. It also coordinates the reversing valve, condenser fan, and the 24V control signals to the indoor unit. A failed defrost board commonly shows up as a heat pump that ices over in winter, never defrosts, defrosts too often, or loses heating output entirely.\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\u003eDefrost 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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eDefrost timing, coil sensor input, reversing valve control\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 the factory defrost control board for the ICP \/ Tempstar \/ Heil WCH5184GKA200 heat pump and same-platform ICP-family outdoor units using this board. Match your existing board part number and connector layout before ordering, as defrost boards are model-specific.\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 control panel with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit control-box service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every plug, wire, and terminal on the old board before removing anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug each connector, release the board standoffs or screws, and lift out the failed board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on its standoffs and reconnect each connector to the matching position per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heat-pump heating call, and confirm normal operation and a clean defrost cycle.\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 the unit never goes into defrost.\u003c\/li\u003e\n\u003cli\u003eHeat pump defrosts constantly or at the wrong intervals.\u003c\/li\u003e\n\u003cli\u003eNo heating output or the reversing valve never switches.\u003c\/li\u003e\n\u003cli\u003eBoard shows burn marks, corrosion, or no status LED.\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 hassle-free returns. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027250135411,"sku":"1173636","price":168.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047492764019,"sku":"1173636-GEN","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1173636_9f3139a0-fc59-4135-923a-86143e8f3dba.jpg?v=1782886533","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-wch5184gka200-24v-heat-pump-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}