{"product_id":"icp-defrost-control-board-for-yd024ga-heat-pump-ships-today-1","title":"ICP Defrost Control Board for YD024GA — Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is a genuine OEM defrost control board (part #34330100, \"DEFROST CONTROL BOARD\") for the ICP \/ Tempstar \/ Heil YD024GA heat pump. The defrost board is the brains of the outdoor unit in heating mode: it monitors the defrost thermostat\/sensor, runs the selectable defrost timer (typically 30\/60\/90 minutes), energizes the reversing valve and compressor, and turns the outdoor fan off so accumulated frost melts off the coil. When the board fails, the heat pump either never defrosts — letting the outdoor coil ice over and starving the system of heat — or defrosts constantly, hammering efficiency and comfort. Symptoms of board failure include a frozen outdoor coil, auxiliary\/emergency heat running far too often, or the unit failing to switch between heat and defrost cycles. A new board restores proper defrost staging and heating performance.\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\u003e34330100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDefrost Control Circuit Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Tempstar \/ Heil \/ Comfortmaker\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\u003eTimer Options\u003c\/td\u003e\n\u003ctd\u003eSelectable defrost interval (jumper-set)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eFits the ICP\/Tempstar\/Heil YD024GA heat pump and related ICP-family heat pumps originally equipped with defrost board 34330100. Confirm the printed part number and connector layout on your existing board 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 verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service\/control panel to reach the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire, connector, and the defrost timer jumper position.\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 — Mount the new board, set the timer jumper to match the original, and reconnect every harness per your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heat call (or forced defrost), and confirm proper defrost initiation and termination.\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 the unit never defrosts\u003c\/li\u003e\n\u003cli\u003eHeat pump defrosts too frequently, killing efficiency\u003c\/li\u003e\n\u003cli\u003eAuxiliary\/emergency heat runs constantly in heat mode\u003c\/li\u003e\n\u003cli\u003eNo reversing-valve or fan response during the defrost cycle\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":63027197411699,"sku":"34330100","price":180.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047499645299,"sku":"34330100-GEN","price":139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-34330100_a4bb0f73-4056-4a7e-9a2a-7785c58c8e0f.jpg?v=1782886723","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-yd024ga-heat-pump-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}