{"product_id":"icp-defrost-control-board-for-wch3364gka1-oem-1173636-ships-today","title":"ICP Defrost Control Board for WCH3364GKA1 – OEM 1173636 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe OEM defrost control board (part number 1173636) is the brain of the defrost cycle on your ICP\/Tempstar\/Heil WCH3364GKA1 heat pump. It monitors coil temperature and run time, then commands the unit into defrost to clear ice from the outdoor coil during heating operation. When this board fails, the heat pump may ice over completely, run continuous defrost, fail to switch into heating, or trip on high head pressure. Replacing the board with a genuine OEM part restores correct defrost timing and protects the compressor from liquid slugging.\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump – Defrost Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\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 factory replacement for the ICP WCH3364GKA1 heat pump and other ICP-family condensing units that originally shipped with board 1173636. 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 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's control-panel service cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph every wire and terminal position before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Unplug the wire harnesses, release the standoffs or mounting screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Snap the new board onto the standoffs and reconnect every harness exactly as photographed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power, confirm normal startup, and verify a forced or timed defrost cycle initiates correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil freezes solid and never defrosts.\u003c\/li\u003e\n\u003cli\u003eUnit gets stuck in continuous defrost mode.\u003c\/li\u003e\n\u003cli\u003eNo heating output or no compressor\/reversing-valve operation.\u003c\/li\u003e\n\u003cli\u003eVisible burnt traces, scorched relays, or corrosion 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":63021598638451,"sku":"1173636","price":155.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047491748211,"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_c5a0194f-51e9-4a3f-b22d-ce052b6a3877.jpg?v=1782886470","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-wch3364gka1-oem-1173636-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}