{"product_id":"tempstar-control-board-for-t4a360gkn300-comfortalert-diagnostic-ships-today","title":"Tempstar Control Board for T4A360GKN300 – ComfortAlert Diagnostic | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM ComfortAlert control board (part number 1177402) for the Tempstar T4A360GKN300 condensing unit. The ComfortAlert module is a diagnostic and protection board that monitors the compressor and the 24V control circuit, flashing fault codes through an onboard LED to help technicians pinpoint problems such as locked-rotor, open-circuit, low-voltage, short-cycling, and welded-contactor conditions. It also provides anti-short-cycle protection that prevents the compressor from restarting too quickly after a shutdown. When this board fails, the outdoor unit may refuse to start, short-cycle, lose its diagnostic LED, or trip protective lockouts even when the compressor itself is healthy. Replacing a faulty ComfortAlert board restores both protection and on-unit troubleshooting.\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\u003eOEM Part 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 Diagnostic \/ Protection 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\u003e24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunctions\u003c\/td\u003e\n\u003ctd\u003eCompressor monitoring, fault codes, anti-short-cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eT4A360GKN300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThis control board is the factory-specified replacement for the Tempstar T4A360GKN300 and other ICP-family (Tempstar, Heil, Comfortmaker) condensing units that use OEM part 1177402. Match the part number on 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 panel to expose the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph every low-voltage and sensor connection before unplugging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Unplug the connectors, release the mounting standoffs, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Snap the new board onto the standoffs and reconnect each plug exactly as photographed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power, confirm the LED illuminates, and verify normal compressor operation with no fault codes.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDiagnostic LED is dark or stuck flashing a constant fault.\u003c\/li\u003e\n\u003cli\u003eCompressor short-cycles or locks out for no mechanical reason.\u003c\/li\u003e\n\u003cli\u003eOutdoor unit will not start despite a valid cooling call.\u003c\/li\u003e\n\u003cli\u003eErratic or false fault codes after a power event or storm.\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. National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021806682483,"sku":"1177402-GEN","price":185.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048437072243,"sku":"1177402","price":240.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1177402_22d99159-413e-4a83-8d0c-65a7b06dc5a0.jpg?v=1782959558","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-control-board-for-t4a360gkn300-comfortalert-diagnostic-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}