{"product_id":"tempstar-defrost-control-board-for-tch242aka1-heat-pump-ships-today","title":"Tempstar Defrost Control Board for TCH242AKA1 — Heat Pump | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is the genuine OEM defrost control board (part #1086070) for the Tempstar TCH242AKA1 heat pump. The defrost board is the brain of the outdoor unit's defrost cycle — it monitors the defrost thermostat and run time, then commands the reversing valve and shuts off the outdoor fan to melt frost off the coil during cold-weather operation. It also manages compressor timing and contactor energization. When the board fails, the heat pump may ice over solid, skip defrost entirely, run defrost too often, or fail to start the compressor. Because it coordinates several components, an intermittent or failed defrost board can produce confusing, hard-to-diagnose symptoms.\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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1086070\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\u003e24V AC\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\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect OEM replacement for the Tempstar TCH242AKA1 heat pump and compatible ICP\/Heil\/Comfortmaker outdoor units that use this defrost board. Match the part number and connector layout to your existing board before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-panel cover to expose the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire and connector position; defrost boards have many terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug harnesses, release the board standoffs\/screws, 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 and reconnect every harness exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating call, and verify normal operation; force or wait for a defrost cycle to confirm correct sequencing.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over and never goes into defrost\u003c\/li\u003e\n\u003cli\u003eUnit runs defrost constantly or at the wrong times\u003c\/li\u003e\n\u003cli\u003eCompressor or outdoor fan won't energize on a call\u003c\/li\u003e\n\u003cli\u003eNo 24V output to the contactor or reversing valve when expected\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":63021656670579,"sku":"1086070-GEN","price":128.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048447918451,"sku":"1086070","price":166.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-1086070_561df5cc-4826-4a4c-b2e5-19040f14e792.jpg?v=1782959955","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-defrost-control-board-for-tch242aka1-heat-pump-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}