{"product_id":"icp-defrost-control-board-for-yj030g-24v-heat-pump-timer-ships-today-1","title":"ICP Defrost Control Board for YJ030G — 24V Heat Pump Timer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM ICP Defrost Control Board (part number 34332101) is the brain of the defrost cycle on your ICP\/Tempstar\/Heil YJ030G heat pump. It monitors outdoor coil temperature and run time, then initiates and terminates the defrost cycle so frost and ice are cleared from the outdoor coil during heating operation. The board operates on a 24V control circuit and coordinates the reversing valve, outdoor fan, and compressor timing. When this board fails, the heat pump can ice over, lose heating capacity, run the auxiliary heat strips constantly, or refuse to switch out of defrost. Replacing a failed defrost control board restores proper defrost timing and protects the compressor from liquid slugging.\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\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\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct OEM replacement for the ICP\/Tempstar\/Heil YJ030G heat pump and equivalent units in the same family that originally shipped with part 34332101. Always confirm the part number printed on your existing board before ordering.\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 breaker and the outdoor disconnect, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control access panel on the outdoor unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and terminal position on the existing board before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the low-voltage and line-voltage leads, then unscrew or unclip the old board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, reconnect each wire to the matching terminal per your photo, and confirm the defrost timing pins\/jumpers match the original.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and verify the unit enters heating, initiates a defrost cycle, and terminates normally.\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 never clears during heating\u003c\/li\u003e\n\u003cli\u003eHeat pump locks into a continuous defrost cycle or never defrosts at all\u003c\/li\u003e\n\u003cli\u003eAuxiliary\/emergency heat runs constantly, driving up energy bills\u003c\/li\u003e\n\u003cli\u003eVisible scorching, burnt traces, or no response from the board on a call for heat\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":63027190530419,"sku":"34332101","price":184.6,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047504200051,"sku":"34332101-GEN","price":142.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-34332101_97eb5753-095a-43bf-952e-b229184f6d1f.jpg?v=1782887119","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-yj030g-24v-heat-pump-timer-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}