{"product_id":"icp-defrost-control-board-for-wch3482gka1-24v-heat-pump-ships-today","title":"ICP Defrost Control Board for WCH3482GKA1 — 24V Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is a genuine OEM defrost control board (part #1173636) for the ICP \/ Heil \/ Tempstar heat pump model WCH3482GKA1. The defrost board is the brain of the outdoor unit during heating season — it monitors coil temperature and run time, then initiates and terminates the defrost cycle that melts frost off the outdoor coil. It also coordinates the reversing valve, compressor, outdoor fan, and auxiliary heat during defrost. When this 24V board fails, the heat pump cannot clear ice from the coil, efficiency collapses, and the system may lock out or trip on high pressure. Common failure signs include a coil that ices over solid, no defrost cycle, continuous defrost, or no compressor operation in heating mode.\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 \/ Heil \/ Tempstar\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump Outdoor Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM Direct Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect OEM replacement for ICP-family heat pumps including model WCH3482GKA1 and related Heil, Tempstar, and Comfortmaker units that originally shipped with board 1173636. Always verify the part number printed 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 outdoor disconnect and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit control-panel service cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and terminal connection before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect all wiring harnesses and sensor leads, then unscrew the failed board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, transfer the defrost sensor and all connections exactly per your photo, and confirm the defrost timing jumper matches the original (30\/60\/90 min).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run the unit in heating mode, and confirm a normal defrost cycle initiates and terminates correctly.\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 defrosts\u003c\/li\u003e\n\u003cli\u003eUnit gets stuck in continuous defrost\u003c\/li\u003e\n\u003cli\u003eNo compressor or reversing-valve action in heat mode\u003c\/li\u003e\n\u003cli\u003eVisible burn marks, scorched traces, or a failed relay on the board\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":63021597753715,"sku":"1173636","price":155.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047492010355,"sku":"1173636-GEN","price":119.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1173636_0d64ad86-1dff-4cea-b129-a1c9ce797986.jpg?v=1782886485","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-wch3482gka1-24v-heat-pump-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}