{"product_id":"tempstar-ptac-thermostat-for-tha15k25sta-oem-part-1058517-ships-today","title":"Tempstar PTAC Thermostat for THA15K25STA — OEM Part 1058517 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM PTAC thermostat (part number 1058517, \"TSTAT PTAC X\") for the Tempstar THA15K25STA heat pump system. The thermostat is the command center of the unit, reading indoor temperature and signaling the system to call for heating or cooling. A failing thermostat is one of the most common causes of comfort complaints: when it loses calibration or its internal contacts wear out, the system may short-cycle, fail to reach setpoint, or stop responding to temperature changes entirely. Replacing it with a factory-matched control restores accurate, reliable operation without guesswork. This unit is built to the exact electrical and mounting specification of the original, ensuring proper 24V signaling to the contactor, reversing valve, and blower circuits.\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\u003e1058517\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePTAC Thermostat (TSTAT PTAC X)\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 \/ Air Handler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM Direct 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 as a direct-fit replacement for the Tempstar THA15K25STA model. Because ICP, Heil, Tempstar, and Comfortmaker share a common parts platform, part 1058517 is also used across closely related models in this PTAC and heat pump line. Always confirm the printed part number on your existing thermostat 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 breaker 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 unit's service panel or control cover to expose the thermostat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Take a clear photo of every wire and terminal position before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the low-voltage leads, then release the mounting clips\/screws and lift out the old thermostat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new thermostat, then reconnect each wire to its matching terminal per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and verify the unit responds correctly to both heating and cooling setpoint changes.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSystem fails to reach or hold the setpoint temperature.\u003c\/li\u003e\n\u003cli\u003eUnit short-cycles or runs continuously regardless of room temperature.\u003c\/li\u003e\n\u003cli\u003eNo response when adjusting the temperature or mode.\u003c\/li\u003e\n\u003cli\u003eBlank, frozen, or erratic display\/readout.\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":63021639958899,"sku":"1058517-GEN","price":79.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048483275123,"sku":"1058517","price":103.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-thermostat-nonprogrammable-1058517_0d461457-cc71-448a-ae6a-63ba1e0edddb.jpg?v=1782961139","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-ptac-thermostat-for-tha15k25sta-oem-part-1058517-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}