{"product_id":"tempstar-control-board-comfortalert-for-txa642gka100-oem-1177402-ships-today","title":"Tempstar Control Board ComfortAlert for TXA642GKA100 — OEM 1177402 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Tempstar 1177402 ComfortAlert control board is the OEM diagnostic and compressor-protection module for the TXA642GKA100 condensing unit. This board continuously monitors compressor and system operation, flashing fault codes that pinpoint problems such as locked rotor, open circuit, low voltage, and short cycling. When this board fails, the outdoor unit may not start, may trip on protection faults, or may run without proper compressor protection — risking expensive compressor damage. Replacing it with the genuine OEM 1177402 restores accurate diagnostics and factory-grade safeguarding.\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\u003e1177402\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eComfortAlert Control \/ Diagnostic 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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCompressor monitoring \u0026amp; fault-code diagnostics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eTXA642GKA100\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\u003eDesigned for the Tempstar TXA642GKA100 air conditioner\/heat pump condensing unit and equivalent ICP-family (Heil, Comfortmaker) systems that originally shipped with the 1177402 ComfortAlert module. Always confirm the part number on your existing board before ordering.\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 control-panel service cover on the condensing unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wiring and connector positions before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the low-voltage connectors and release the board from its standoffs\/mounting clips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Snap the new 1177402 board onto the standoffs and reconnect every wire exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, start a cooling cycle, and confirm the diagnostic LED shows normal operation with no fault codes.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor unit will not start or compressor won't engage\u003c\/li\u003e\n\u003cli\u003ePersistent or erratic fault-code LED flashes\u003c\/li\u003e\n\u003cli\u003eFrequent short cycling or nuisance protection trips\u003c\/li\u003e\n\u003cli\u003eNo diagnostic LED activity with power confirmed at the board\u003c\/li\u003e\n\u003c\/ul\u003e\n\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":63021626720627,"sku":"1177402-GEN","price":149.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048434549107,"sku":"1177402","price":194.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1177402_be5dfc63-7659-47ff-ba52-10c308af3283.jpg?v=1782959488","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-control-board-comfortalert-for-txa642gka100-oem-1177402-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}