{"product_id":"icp-defrost-control-board-for-ya100na1-heat-pump-ships-today-1","title":"ICP Defrost Control Board for YA100NA1 — Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM defrost control board (part number 1052757) is the brain of the defrost cycle on the ICP YA100NA1 heat pump. It monitors coil temperature and run time, then commands the reversing valve and auxiliary heat to clear frost from the outdoor coil during cold-weather operation. When this board fails, the unit may ice over and lose heating capacity, run continuous or excessively long defrost cycles, fail to switch the reversing valve, or stop responding to the defrost thermostat altogether. A failing board is a common cause of a heat pump that freezes up in winter or short-cycles between heat and defrost.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\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\u003e1052757\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump Defrost Timing \u0026amp; Reversing Valve Control\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDirect OEM replacement for the ICP \/ Heil \/ Tempstar YA100NA1 heat pump and compatible units using the 1052757 defrost control board. Confirm the board part number printed on your existing board before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the disconnect and breaker, then 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 to expose the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every harness, sensor, and terminal connection before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug all connectors, release the board's standoffs or screws, and lift it out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on its standoffs and reconnect every harness and the defrost sensor per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm a normal defrost initiation and termination cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over and heating capacity drops\u003c\/li\u003e\n\u003cli\u003eDefrost cycle runs continuously or never initiates\u003c\/li\u003e\n\u003cli\u003eReversing valve fails to switch during defrost\u003c\/li\u003e\n\u003cli\u003eNo response from the defrost sensor or board LED is dark\/faulted\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\n\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":63027198427507,"sku":"1052757","price":168.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047497482611,"sku":"1052757-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-1052757_7906c42c-529c-48c7-9721-0615d6516d17.jpg?v=1782886651","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-ya100na1-heat-pump-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}