{"product_id":"tempstar-comfort-alert-control-board-for-t4a430gkd200-diagnostic-module-ships-today","title":"Tempstar Comfort Alert Control Board for T4A430GKD200 — Diagnostic Module | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM Comfort Alert control board \/ diagnostic module (part number 1177402) for the Tempstar T4A430GKD200 condensing unit. The Comfort Alert module continuously monitors the compressor and its supporting electrical components, watching for conditions such as locked rotor, open circuit, low voltage, missed start, contactor problems, and welded contactors. It communicates fault conditions through a flashing diagnostic LED so a technician can pinpoint the failure quickly instead of guessing. When this board fails, you may lose compressor protection and diagnostics — symptoms include no LED activity, the compressor failing to start despite a good contactor and capacitor, false or persistent fault flashes, or erratic system behavior. Replacing a failed module restores proper monitoring and protects the compressor investment.\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\u003eComfort Alert Diagnostic Control Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar (ICP \/ Heil family)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCompressor monitoring \u0026amp; fault diagnostics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicator\u003c\/td\u003e\n\u003ctd\u003eFlashing LED fault codes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eAC \/ heat pump compressor protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDirect OEM replacement for the Tempstar T4A430GKD200 condensing unit and other ICP \/ Heil \/ Tempstar \/ Comfortmaker equipment using part 1177402. Confirm the part number printed on your existing module 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 outdoor disconnect and verify zero voltage with a multimeter before touching the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser control-panel access cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire harness and terminal connection on the existing module before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the harness connectors, release the board's mounting standoffs\/screws, and lift out the old module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on its standoffs and reconnect each harness exactly per your photo and the unit wiring diagram.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, call for cooling, and confirm the diagnostic LED shows a normal status and the compressor starts and runs.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo diagnostic LED activity at the module with power present.\u003c\/li\u003e\n\u003cli\u003eCompressor won't start even with a verified-good capacitor and contactor.\u003c\/li\u003e\n\u003cli\u003ePersistent or nonsensical fault flashes that don't match measured conditions.\u003c\/li\u003e\n\u003cli\u003eLoss of compressor protection or erratic outdoor-unit behavior.\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":63021805699443,"sku":"1177402-GEN","price":144.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048416199027,"sku":"1177402","price":188.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1177402_5972b139-76a6-4c73-bf34-9636aa71ce83.jpg?v=1782958679","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-comfort-alert-control-board-for-t4a430gkd200-diagnostic-module-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}