{"product_id":"tempstar-comfortalert-control-board-for-txa660gka100-diagnostic-defrost-board-ships-today","title":"Tempstar ComfortAlert Control Board for TXA660GKA100 — Diagnostic Defrost Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM ComfortAlert control board (part number 1177402) is the electronic brain of the Tempstar TXA660GKA100 outdoor unit. It manages compressor operation, monitors current and voltage, and provides on-board diagnostics that flag faults such as low\/high pressure trips, locked rotor, short cycling, and welded contactor conditions. The diagnostic LED translates compressor and system faults into flash codes, dramatically reducing troubleshooting time. When this board fails, the unit may not start at all, cycle erratically, ignore the thermostat call, or display no diagnostic feedback. Operating on the 24V control circuit, it protects the compressor — the most expensive component in the system — from damaging fault 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\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 Diagnostics \u0026amp; System Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eAC \/ Heat Pump Outdoor Unit\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 TXA660GKA100 condensing unit. This ComfortAlert module is shared across many ICP-family outdoor units (Heil, Comfortmaker, Tempstar) of the same generation. Verify the connector layout and part number against your existing board 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 outdoor disconnect and breaker; verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service \/ control panel to expose the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every wire harness and terminal connection before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the low-voltage and line connections, then release the board from its standoffs or mounting screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on the mounts 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 normal operation and a healthy diagnostic LED status.\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 won't respond to a thermostat call for cooling\u003c\/li\u003e\n\u003cli\u003eNo diagnostic LED activity or scrambled\/constant fault codes\u003c\/li\u003e\n\u003cli\u003eCompressor short-cycles or trips intermittently with no mechanical cause\u003c\/li\u003e\n\u003cli\u003eVisible burnt traces, scorched relays, or swollen components 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. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021626360179,"sku":"1177402-GEN","price":184.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048418034035,"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-defrost-1177402.jpg?v=1782958714","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-comfortalert-control-board-for-txa660gka100-diagnostic-defrost-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}