{"product_id":"tempstar-control-board-for-t4a336gkd200-comfort-alert-diagnostics-ships-today","title":"Tempstar Control Board for T4A336GKD200 – Comfort Alert Diagnostics | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM Comfort Alert control board (part #1177402) for the Tempstar T4A336GKD200 heat pump condensing unit. The Comfort Alert module is the brain of the outdoor unit's diagnostic and protection system, continuously monitoring compressor and contactor operation, supply voltage, and run-time faults. It reports issues through an onboard status LED so technicians can pinpoint problems such as a locked rotor, open circuit, missing phase, or low supply voltage without guesswork. When this board fails, the unit may refuse to start, short-cycle, lose its protective lockouts, or stop communicating fault codes entirely.\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\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump Condensing Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered for the Tempstar T4A336GKD200 heat pump and shared across many ICP-built T4A3 series units sold under the Tempstar, Heil, Comfortmaker, and ICP brands. Always confirm the printed part number on your existing board matches 1177402 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 any wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e – Remove the condenser control panel cover to expose the existing board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph every wire and terminal connection before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Label and unplug the low-voltage and line connections, then unsnap or unscrew the old board from its standoffs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Mount the new 1177402 board, reconnect each wire exactly as photographed, and confirm the harness is fully seated.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power, watch the status LED for a normal boot sequence, and verify the unit starts and runs without 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\u003eOutdoor unit will not start or randomly short-cycles.\u003c\/li\u003e\n\u003cli\u003eStatus LED is dark, flashing erratically, or stuck on a fault code.\u003c\/li\u003e\n\u003cli\u003eCompressor or contactor will not energize on a valid call.\u003c\/li\u003e\n\u003cli\u003eLoss of protective lockouts (low voltage, locked rotor, etc.).\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":63021811990899,"sku":"1177402-GEN","price":189.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048436482419,"sku":"1177402","price":245.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1177402_6e69f0f5-de80-48d9-9768-4f6e88115e89.jpg?v=1782959537","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-control-board-for-t4a336gkd200-comfort-alert-diagnostics-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}