{"product_id":"tempstar-defrost-control-board-for-t2h342gkd200-heat-pump-defrost-ships-today","title":"Tempstar Defrost Control Board for T2H342GKD200 — Heat Pump Defrost | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM defrost control board (part 1173636) is the brain of the defrost cycle on your Tempstar T2H342GKD200 heat pump. It monitors coil temperature and run time, then initiates and terminates the defrost cycle, energizes the reversing valve, and controls the outdoor fan and auxiliary heat during defrost. A failed defrost board leads to a frosted or iced-over outdoor coil, poor heating performance, short cycling, or a unit that never exits defrost. Replacing the board with the correct OEM part restores proper defrost timing and protects the compressor from liquid floodback.\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\u003eOEM Part 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\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 \/ Reversing Valve Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect-fit OEM replacement for the Tempstar T2H342GKD200 heat pump and related ICP \/ Heil \/ Comfortmaker heat pumps using the 1173636 defrost board. Confirm the part number printed on your existing board before ordering, as defrost timing pins differ by platform.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-box service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire, plug, and timing-pin setting on the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug harnesses and unsnap or unscrew the board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new board, match the defrost timing-pin selection, and reconnect each harness per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and force a defrost test to confirm the reversing valve and fan respond correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil ices up and won't defrost\u003c\/li\u003e\n\u003cli\u003eUnit stuck in continuous defrost\u003c\/li\u003e\n\u003cli\u003eNo reversing-valve switching during defrost\u003c\/li\u003e\n\u003cli\u003eErratic heat-pump operation or short cycling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\u003cp\u003eShips same day on orders placed 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":63021819724147,"sku":"1173636-GEN","price":159.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048439595379,"sku":"1173636","price":206.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1173636_5dae3412-0d6a-4625-ad61-04bd443e0577.jpg?v=1782959658","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-defrost-control-board-for-t2h342gkd200-heat-pump-defrost-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}