{"product_id":"icp-defrost-control-board-for-ryma10n001a-heat-pump-timer-board-ships-today","title":"ICP Defrost Control Board for RYMA10N001A — Heat Pump Timer Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM defrost control board (part 1052757) is the brain of the defrost cycle on your ICP \/ Heil \/ Tempstar RYMA10N001A heat pump. It monitors coil temperature and elapsed run time, then commands the reversing valve and shuts off the outdoor fan to melt frost from the outdoor coil during heating season. When the board fails, the unit can ice over in heating mode, run an endless defrost, never defrost at all, or lose compressor\/fan control entirely. Common failure symptoms include a frozen outdoor coil, the system stuck blowing cold air during a heat call, blown control fuses, scorched relays on the board, or no response from the outdoor unit.\u003c\/p\u003e\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\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 timing, reversing valve \u0026amp; fan control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eBuilt for the ICP \/ Heil \/ Tempstar \/ Comfortmaker RYMA10N001A heat pump and shared-platform outdoor units that use the same defrost control. Confirm the OEM number and connector layout against your existing board before installing.\u003c\/p\u003e\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before opening the control box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit's electrical service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every plug, sensor lead, and terminal on the existing board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the harnesses, release the standoffs\/screws, 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 exactly per your photo, including the defrost thermostat\/sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, force a defrost test cycle, and confirm proper reversing-valve and fan operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor coil freezes solid in heating mode\u003c\/li\u003e\n\u003cli\u003eUnit never enters defrost or stays in defrost continuously\u003c\/li\u003e\n\u003cli\u003eSystem blows cold air during a heat call\u003c\/li\u003e\n\u003cli\u003eBurnt relays, scorch marks, or no output from the board\u003c\/li\u003e\n\u003c\/ul\u003e\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":63021834666355,"sku":"1052757","price":219.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047491027315,"sku":"1052757-GEN","price":169.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1052757_e78f5336-07f5-4a57-a7a0-4aabf2dd35bc.jpg?v=1782886415","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-ryma10n001a-heat-pump-timer-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}