{"product_id":"icp-defrost-control-board-for-ryma10h001-heat-pump-ships-today","title":"ICP Defrost Control Board for RYMA10H001 — Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM defrost control board (part 1052757) is the brain of the heat-pump defrost cycle on the ICP Tempstar\/Heil RYMA10H001. In heating mode the outdoor coil accumulates frost; the defrost board monitors coil temperature and accumulated run time, then periodically reverses the cycle to melt that ice and protect efficiency. It coordinates the reversing valve, the compressor, the outdoor fan, and the auxiliary heat. When this board fails, the outdoor unit can ice over completely, lose heating capacity, or trip on high pressure — symptoms that are easy to misdiagnose as a refrigerant problem.\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\u003eOEM Part 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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eDefrost cycle timing \u0026amp; sequencing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect-fit for the ICP Tempstar Heil RYMA10H001 heat pump and related ICP heat-pump models that use the same defrost board footprint and connector layout. Match the part number and pin configuration to your existing board before installing.\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 confirm zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit control-box panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every connector and the defrost sensor lead before unplugging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the low-voltage harnesses, release the board standoffs, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on its standoffs and reconnect each harness per your photo, including the defrost thermostat\/sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and initiate a forced defrost (per the board's test pins) to confirm the reversing valve and fan respond.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil fully iced over in heating mode\u003c\/li\u003e\n\u003cli\u003eDefrost cycle never initiates or runs continuously\u003c\/li\u003e\n\u003cli\u003eOutdoor fan or reversing valve not responding on call\u003c\/li\u003e\n\u003cli\u003eNo control output despite 24V present at 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":63021834862963,"sku":"1052757","price":141.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047490929011,"sku":"1052757-GEN","price":109.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1052757_21ee0a16-5811-4b67-ad47-b026d53f28d9.jpg?v=1782886408","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-ryma10h001-heat-pump-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}