{"product_id":"icp-defrost-control-board-for-ryma10f001-24v-heat-pump-ships-today","title":"ICP Defrost Control Board for RYMA10F001 — 24V Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM defrost control board (PN 1052757) is the factory-specified defrost logic module for the \u003cstrong\u003eICP RYMA10F001\u003c\/strong\u003e heat pump. In heating mode the board monitors the defrost thermostat and an internal timer to decide when frost has built up on the outdoor coil, then reverses the refrigerant cycle, energizes the reversing valve, and shuts off the outdoor fan to melt ice — restoring normal operation once the coil clears. When this board fails, the unit may ice over solid in cold weather, never enter defrost, get stuck in defrost, or fail to energize the compressor and reversing valve at all.\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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eTimed\/demand defrost, reversing valve \u0026amp; fan 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\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eFits ICP \/ Tempstar \/ Heil model \u003cstrong\u003eRYMA10F001\u003c\/strong\u003e heat pump condensing units. Match the part number and connector layout to your existing board before ordering, and confirm your defrost timer pin selection (30\/60\/90 min) when transferring the jumper.\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 breaker; verify zero voltage with a multimeter before touching the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser control-box service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every harness plug, terminal, and the defrost timer jumper position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug each connector, release the board standoffs\/screws, and lift the old board out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, set the defrost timer jumper to match the original, and reconnect each harness per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating cycle, and initiate a forced defrost to confirm the reversing valve and fan respond 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 clears in heating mode.\u003c\/li\u003e\n\u003cli\u003eUnit gets stuck in defrost or cycles defrost constantly.\u003c\/li\u003e\n\u003cli\u003eNo compressor or reversing-valve operation in heat mode.\u003c\/li\u003e\n\u003cli\u003eBurn marks, corrosion, or failed relays visible 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":63021835190643,"sku":"1052757","price":175.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047490830707,"sku":"1052757-GEN","price":134.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1052757.jpg?v=1782886400","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-ryma10f001-24v-heat-pump-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}