{"product_id":"tempstar-comfort-alert-control-board-for-t4a318gka200-diagnostic-module-ships-today","title":"Tempstar Comfort Alert Control Board for T4A318GKA200 — Diagnostic Module | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM Comfort Alert control board (part number 1177402) is the diagnostic and compressor-protection module for the Tempstar T4A318GKA200 outdoor unit. It continuously monitors compressor operation and the 24V control circuit, flashing fault codes that pinpoint problems such as low voltage, locked rotor, open circuit, and short cycling. When this board fails, the system may lose protective shutdown features, refuse to run, or report erratic fault codes that don't match real conditions.\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\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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCompressor monitoring \u0026amp; fault diagnostics\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 T4A318GKA200 condensing unit. The Comfort Alert module (1177402) is shared across many ICP-family Tempstar, Heil, and Comfortmaker condensers and heat pumps — verify the part number against your unit 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 at the board with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service panel to reach the control compartment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every low-voltage lead and connector on the board before removing anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the connectors, release the board from its standoffs or screws, and lift it out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on its mounts and reconnect each lead exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, call for cooling, and confirm normal operation with no active fault codes on the LED.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo or erratic LED status\/fault codes from the diagnostic light\u003c\/li\u003e\n\u003cli\u003eCompressor protection features no longer engaging\u003c\/li\u003e\n\u003cli\u003ePersistent false fault codes that don't match measured conditions\u003c\/li\u003e\n\u003cli\u003eUnit fails to start despite a good contactor and capacitor\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":63021818741107,"sku":"1177402-GEN","price":119.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048414757235,"sku":"1177402","price":155.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1177402_38a3ec53-3bba-4bd5-a2dd-5e93d9469ee2.jpg?v=1782958660","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-comfort-alert-control-board-for-t4a318gka200-diagnostic-module-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}