{"product_id":"tempstar-control-board-for-t4a460gkd100-comfortalert-diagnostic-module-ships-today","title":"Tempstar Control Board for T4A460GKD100 — ComfortAlert Diagnostic Module | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM ComfortAlert control board (part number 1177402) for the Tempstar T4A460GKD100 condensing unit. The ComfortAlert diagnostic module continuously monitors the compressor and system electrical operation, detecting faults such as locked rotor, open circuits, low voltage, and short cycling before they cause catastrophic compressor failure. When this board fails, the unit may stop cooling entirely, refuse to start, trip on faults, or flash diagnostic LED codes that no longer correspond to actual conditions. Replacing a failed board with the exact OEM part restores accurate fault reporting and protects your 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\u003eComfortAlert Diagnostic Control Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar (ICP \/ Heil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCompressor \u0026amp; system fault monitoring\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\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eT4A460GKD100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDesigned as a direct-fit replacement for the Tempstar T4A460GKD100 air conditioner. This board is shared across many ICP-family condensing units (Tempstar, Heil, ICP, Comfortmaker) of the same series. Always confirm the printed part number 1177402 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 breaker and the outdoor disconnect, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-box service panel on the condensing unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wiring and connector positions before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the low-voltage and sensing connectors, release the board standoffs or mounting 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 mounts and reconnect every harness exactly as photographed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, allow the module to initialize, and confirm normal operation with no fault codes flashing.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnit will not start or randomly stops cooling\u003c\/li\u003e\n\u003cli\u003ePersistent or nonsensical diagnostic LED fault codes\u003c\/li\u003e\n\u003cli\u003eCompressor short-cycling or nuisance trips\u003c\/li\u003e\n\u003cli\u003eNo response to thermostat calls despite good 24V signal\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":63021804159347,"sku":"1177402-GEN","price":149.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048437399923,"sku":"1177402","price":193.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1177402_9158ed33-0369-4e07-87e4-2a65ff7a66aa.jpg?v=1782959570","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-control-board-for-t4a460gkd100-comfortalert-diagnostic-module-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}