{"product_id":"icp-defrost-control-board-for-yj018g-oem-34332101-heat-pump-timer-ships-today-1","title":"ICP Defrost Control Board for YJ018G — OEM 34332101 Heat Pump Timer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe ICP defrost control board (OEM part 34332101) governs the defrost cycle on your ICP \/ Tempstar \/ Heil YJ018G heat pump. It tracks outdoor coil temperature and accumulated run time, then triggers a defrost cycle by energizing the reversing valve and stopping the outdoor fan so frost melts off the coil. A failed board causes one of two problems: the unit never defrosts and ice chokes the coil, dropping heating capacity; or it defrosts excessively, wasting energy and short-cycling. The board runs on a 24V control circuit and coordinates the compressor, reversing valve, and supplemental heat.\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\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump Defrost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered as a direct OEM fit for the ICP \/ Tempstar \/ Heil YJ018G heat pump and matching ICP-family units that originally used part 34332101. Confirm your existing board's part number 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 disconnect and breaker; verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the outdoor unit's electrical access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and terminal before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and unplug each connector, remove the mounting screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 34332101 board, reconnect every lead to match your photo, and set defrost timer pins to match the original.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm the unit completes a normal defrost cycle.\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 defrosts too frequently or runs continuously\u003c\/li\u003e\n\u003cli\u003eNo reversing-valve or fan response during defrost\u003c\/li\u003e\n\u003cli\u003eBurn marks, corrosion, or cracked traces 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":63027191218547,"sku":"34332101","price":188.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047503741299,"sku":"34332101-GEN","price":144.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-34332101_817f5d3a-c3ec-40e0-af09-33e06bba4881.jpg?v=1782887053","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-yj018g-oem-34332101-heat-pump-timer-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}