{"product_id":"tempstar-defrost-control-board-for-t4h430gkd200-oem-heat-pump-board-ships-today","title":"Tempstar Defrost Control Board for T4H430GKD200 - OEM Heat Pump Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM defrost control board (OEM part #1173636) governs the defrost cycle on the Tempstar T4H430GKD200 heat pump. It reads the outdoor coil temperature sensor and a time\/temperature algorithm to detect frost buildup, then commands the reversing valve, energizes the compressor, and de-energizes the outdoor fan to clear the ice. It also enforces compressor anti-short-cycle delays and 24V control sequencing. A failed board can leave the coil iced solid, lock out the compressor, or run auxiliary heat nonstop and drive up the electric bill.\u003c\/p\u003e\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\u003e1173636\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\u003eTempstar (ICP \/ Heil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eDefrost timing, reversing valve \u0026amp; compressor control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eT4H430GKD200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned for the Tempstar T4H430GKD200 heat pump and used across the ICP family (Heil, Comfortmaker, Arcoaire) on units calling for the 1173636 defrost board. Confirm the part number and connector layout against your existing board before ordering.\u003c\/p\u003e\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-box panel to reach the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e - Photograph every wire, connector, and the defrost timer pin setting before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e - Unplug the harness connectors and coil sensor, release the board standoffs, and lift the old board out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e - Seat the new board on the standoffs, reconnect all connectors per your photos, and match the defrost timer pin setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e - Restore power and force or observe a defrost cycle to confirm proper reversing valve and fan operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over and never defrosts\u003c\/li\u003e\n\u003cli\u003eHeat pump stuck running auxiliary\/emergency heat\u003c\/li\u003e\n\u003cli\u003eCompressor or reversing valve fails to switch during defrost\u003c\/li\u003e\n\u003cli\u003eNo 24V output to the contactor on a call for heat or cool\u003c\/li\u003e\n\u003c\/ul\u003e\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":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021786890611,"sku":"1173636-GEN","price":165.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048443986291,"sku":"1173636","price":214.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1173636_65cefb4f-3865-4746-b45f-7071bf834607.jpg?v=1782959823","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-defrost-control-board-for-t4h430gkd200-oem-heat-pump-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}