{"product_id":"icp-defrost-control-board-for-yc048g-24v-heat-pump-defrost-timer-ships-today-1","title":"ICP Defrost Control Board for YC048G — 24V Heat Pump Defrost Timer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe ICP defrost control board (OEM part #34332100) manages the defrost cycle on your YC048G heat pump. Running on 24 volts, it tracks outdoor coil temperature and compressor run time, then initiates defrost by reversing refrigerant flow and stopping the outdoor fan to melt frost from the coil. A failed board commonly leaves the coil iced over, kills heating output, forces constant auxiliary heat, or leaves the outdoor fan running through defrost. This is a genuine OEM replacement, so the defrost timing logic, terminal layout, and relay ratings match the original board 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\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e34332100\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 Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\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\u003eDirect-fit replacement for the ICP \/ Tempstar \/ Heil YC048G heat pump and other units that originally shipped with OEM board 34332100. Verify the part number on your existing board before ordering, since ICP used several board revisions 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 at the board with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser control-panel access 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 and line-voltage connections, then unscrew the old board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board on the standoffs and reconnect each wire per your photo. Match the defrost timing pins\/jumpers to the original setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heat cycle, and confirm a defrost energizes the reversing valve and stops the outdoor fan.\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 in heating mode\u003c\/li\u003e\n\u003cli\u003eHeat pump stops heating or runs strip\/auxiliary heat constantly\u003c\/li\u003e\n\u003cli\u003eOutdoor fan keeps running during a defrost cycle\u003c\/li\u003e\n\u003cli\u003eNo 24V output to the reversing valve or chattering defrost relay\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\n\u003cp\u003eShips same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee — if it doesn't fit your YC048G, we'll make it right.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027197837683,"sku":"34332100","price":193.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047499448691,"sku":"34332100-GEN","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-34332100_04f2dbd1-45a6-4fae-9ff1-511be672f3a6.jpg?v=1782886694","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-yc048g-24v-heat-pump-defrost-timer-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}