{"product_id":"icp-defrost-control-board-for-yg018gc1-heat-pump-ships-today-1","title":"ICP Defrost Control Board for YG018GC1 — Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the OEM defrost control board (ICP part 34332101) for the ICP \/ Tempstar \/ Heil YG018GC1 heat pump. The defrost board is the brain of the outdoor unit's defrost cycle — it monitors the defrost thermostat\/sensor, runs the timing logic (typically selectable 30\/60\/90-minute intervals), energizes the reversing valve coil, and controls the contactor and auxiliary heat during defrost. A failed board can leave the outdoor coil iced over, prevent the unit from switching modes, cause no-heat conditions, or trigger continuous defrost. Replacing the board restores proper defrost timing and protects the compressor from running into a frozen coil.\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 \/ 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; 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\u003eDirect OEM fit for the ICP YG018GC1 heat pump and other ICP-family heat pumps (Tempstar, Heil, Comfortmaker, Arcoaire) that specify defrost board 34332101. Match the connector layout, terminal labeling, and defrost timer pin selection against your existing board before installing.\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 disconnect and breaker, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser control\/access panel to reach the defrost board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wiring, plug positions, and the defrost timer jumper\/pin setting before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the connectors, release the mounting standoffs\/screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, reconnect every plug per your photo, and set the defrost timer pin to match the original.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, initiate a defrost (or force one), and confirm correct mode switching and timing.\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 frosts or ices over and never defrosts.\u003c\/li\u003e\n\u003cli\u003eHeat pump won't switch between heating and cooling.\u003c\/li\u003e\n\u003cli\u003eUnit stuck in continuous defrost or never initiates defrost.\u003c\/li\u003e\n\u003cli\u003eNo response from the board, blown onboard fuse, or burnt\/scorched components.\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.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027195543923,"sku":"34332101","price":206.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047501119859,"sku":"34332101-GEN","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-34332101_5a6ed627-209b-4364-82d2-bd3a51fecc03.jpg?v=1782886845","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-yg018gc1-heat-pump-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}