{"product_id":"tempstar-control-board-for-t4a342gka200-comfortalert-diagnostics-ships-today","title":"Tempstar Control Board for T4A342GKA200 — ComfortAlert Diagnostics | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM ComfortAlert control board (part number 1177402) is the diagnostic and protection module for your Tempstar T4A342GKA200 condensing unit. It continuously watches compressor operation — voltage, current draw, and run behavior — and flashes coded fault signals so a technician can isolate issues such as a locked rotor, open circuit, low voltage, or short cycling without guesswork. A failed board can strip the system of compressor protection, ignore safety lockouts, or stop the unit from running at all. The correct factory board restores both the on-board diagnostics and the safeguards that extend compressor life.\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 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 factory replacement for the Tempstar T4A342GKA200. The 1177402 ComfortAlert module is used across compatible ICP-family Tempstar, Heil, and Comfortmaker single-stage condensers and heat pumps. Match the existing board's part number and connector layout before installing.\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 before touching the control box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service panel to reach the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wire harnesses and plug locations before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the connectors, release the mounting standoffs or screws, and lift out the old board.\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, call for cooling, and confirm the status 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\u003eNo diagnostic LED activity or a board that stays dark on power-up.\u003c\/li\u003e\n\u003cli\u003eCompressor won't start despite a good contactor, capacitor, and call for cooling.\u003c\/li\u003e\n\u003cli\u003ePersistent or nonsensical fault codes that don't match field readings.\u003c\/li\u003e\n\u003cli\u003eVisible scorching, swollen components, or a burnt-electronics smell on 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. National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021811794291,"sku":"1177402-GEN","price":184.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048436580723,"sku":"1177402","price":240.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1177402_4051979e-669e-44c9-ae28-1ec4c79c8b04.jpg?v=1782959541","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-control-board-for-t4a342gka200-comfortalert-diagnostics-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}