{"product_id":"tempstar-ptac-thermostat-for-tha09r25std-oem-part-1058517-ships-today","title":"Tempstar PTAC Thermostat for THA09R25STD — OEM Part 1058517 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM PTAC thermostat (part number 1058517, factory designation \"TSTAT PTAC X\") for the Tempstar THA09R25STD packaged terminal air conditioner. The thermostat is the brain of the PTAC unit — it reads room temperature and signals the compressor, fan, and electric heat to cycle on and off to maintain the setpoint. A failed thermostat is one of the most common reasons a PTAC stops responding: the unit may run continuously, fail to start, ignore temperature changes, or display erratic mode behavior. Replacing it with the correct OEM control restores accurate, reliable temperature management without guesswork.\u003c\/p\u003e\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\u003eFactory Description\u003c\/td\u003e\n\u003ctd\u003eTSTAT PTAC X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePTAC Thermostat \/ Control\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003ePackaged Terminal Air Conditioner (PTAC)\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\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct-fit replacement for the Tempstar THA09R25STD PTAC unit. This same OEM control (1058517) also services closely related THA09-series Tempstar, Heil, and ICP PTAC models. Confirm your unit's model and serial tag before ordering to ensure an exact match.\u003c\/p\u003e\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power to the PTAC at the unit disconnect or breaker and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the front grille\/service panel to expose the control compartment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all thermostat wiring and connector positions before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the wiring harness\/connectors and release the old thermostat from its mounting clips or screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new OEM thermostat, then reconnect the harness exactly as documented in your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, set a call for cooling and heating, and verify the unit cycles and holds setpoint correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePTAC runs constantly and ignores the temperature setpoint.\u003c\/li\u003e\n\u003cli\u003eUnit fails to start in cooling or heating mode.\u003c\/li\u003e\n\u003cli\u003eErratic mode switching or unresponsive controls.\u003c\/li\u003e\n\u003cli\u003eRoom temperature never matches the selected setting.\u003c\/li\u003e\n\u003c\/ul\u003e\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":63021640843635,"sku":"1058517-GEN","price":64.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048481603955,"sku":"1058517","price":84.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-thermostat-nonprogrammable-1058517_0b2eca11-2047-4e07-81cc-e07279b204aa.jpg?v=1782961078","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-ptac-thermostat-for-tha09r25std-oem-part-1058517-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}