{"product_id":"icp-defrost-control-board-for-ryma10h001a-oem-1052757-heat-pump-board-ships-today","title":"ICP Defrost Control Board for RYMA10H001A — OEM 1052757 Heat Pump Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is a genuine OEM defrost control board (part number 1052757) for the ICP Tempstar Heil RYMA10H001A heat pump. The defrost control board governs the outdoor unit's defrost cycle — monitoring coil temperature and accumulated run time, then commanding a reversal into defrost mode to clear frost from the outdoor coil in cold weather. A failed board lets the coil ice over, kills heating capacity, prevents the reversing valve from energizing, or causes the unit to run nonstop without defrosting. Typical symptoms include a solid sheet of ice on the outdoor coil, no switch between heating and cooling, no emergency heat, or continuous operation. This board runs on a 24V control circuit and installs as a direct, plug-in replacement for the original.\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\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 \/ 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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump Defrost Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eRYMA10H001A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eThis board is the factory-specified defrost control for the ICP\/Tempstar\/Heil RYMA10H001A heat pump. Because ICP-family equipment (Tempstar, Heil, Comfortmaker, Arcoaire) shares control platforms, this OEM part frequently services related models — verify against your nameplate or existing part number 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 breaker, then verify zero voltage with a multimeter before touching wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit's control-panel cover to expose the defrost board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and terminal position before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and unplug the low-voltage harness, defrost thermostat, and sensor leads, then unscrew the old board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 1052757 board, reconnect each wire exactly as photographed, and match the defrost timing pin setting to the original.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and verify the unit heats, energizes the reversing valve, and initiates a defrost cycle on demand.\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\u003eHeat pump won't switch between heating and cooling.\u003c\/li\u003e\n\u003cli\u003eReversing valve solenoid fails to energize during defrost.\u003c\/li\u003e\n\u003cli\u003eUnit short-cycles or runs continuously with no heat.\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":63021834797427,"sku":"1052757","price":168.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047490961779,"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_bb6c8ac8-ed0c-45ab-82fb-1e469ad123e1.jpg?v=1782886410","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-ryma10h001a-oem-1052757-heat-pump-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}