{"product_id":"icp-defrost-control-board-for-yg030g-34332101-heat-pump-board-ships-today-1","title":"ICP Defrost Control Board for YG030G — 34332101 Heat Pump Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe 34332101 Defrost Control Board is the OEM brain of the outdoor section on the ICP \/ Tempstar \/ Heil YG030G heat pump. It monitors coil temperature and run time, then initiates and terminates the defrost cycle so frost cannot choke airflow across the outdoor coil during cold-weather heating. The board energizes the reversing valve, controls the compressor contactor, switches the outdoor fan, and brings on auxiliary heat during defrost. When it fails, the system loses its ability to shed ice — leading to a frozen outdoor unit, weak heating, or a unit that never defrosts (or defrosts constantly). This is a direct OEM replacement, not a universal substitute, so timing logic and terminal layout match the original exactly.\u003c\/p\u003e\n\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\u003e34332101\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\u003eTimed\/demand defrost, reversing valve \u0026amp; contactor control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM direct replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered for the ICP Tempstar Heil YG030G heat pump and other ICP-family outdoor units that originally shipped with control board 34332101. Always confirm the printed part number on your existing board before ordering, as ICP used several defrost boards across model years.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit's control-panel service cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and terminal position before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and unplug the low-voltage harness, sensor leads, and high-voltage terminals, then unscrew the old board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 34332101 board, reconnect each wire exactly per your photos, and seat the defrost thermostat\/sensor lead firmly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating cycle, and force\/observe a defrost to confirm the reversing valve and fan respond correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over and the unit never clears it\u003c\/li\u003e\n\u003cli\u003eUnit defrosts constantly or at wrong intervals\u003c\/li\u003e\n\u003cli\u003eNo auxiliary\/emergency heat during defrost\u003c\/li\u003e\n\u003cli\u003eReversing valve or outdoor fan fails to switch on the board's command\u003c\/li\u003e\n\u003c\/ul\u003e\n\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":63027195019635,"sku":"34332101","price":188.5,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047502594419,"sku":"34332101-GEN","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-34332101_2b96ca5f-fbfc-4e93-997c-af3c605f1756.jpg?v=1782886888","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-yg030g-34332101-heat-pump-board-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}