{"product_id":"tempstar-ptac-thermostat-for-thb12r25sta-knob-control-kit-ships-today","title":"Tempstar PTAC Thermostat for THB12R25STA — Knob Control Kit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM PTAC (Packaged Terminal Air Conditioner) thermostat assembly for the Tempstar THB12R25STA unit. The kit includes the thermostat control body (OEM part 1058517) and the matching control knob (OEM part 1058437). The thermostat reads room temperature and cycles the compressor and fan to hold the setpoint selected on the knob. A failed PTAC thermostat typically causes continuous running, no cooling or heating, short-cycling, or a knob that no longer changes the temperature. Installing the exact OEM part restores precise control and avoids any wiring or fit uncertainty.\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\u003eThermostat Part Number\u003c\/td\u003e\n\u003ctd\u003e1058517 (TSTAT PTAC X)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKnob Part Number\u003c\/td\u003e\n\u003ctd\u003e1058437 (KNOB TSTAT PTAC X)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePTAC Knob-Control Thermostat\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\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eTHB12R25STA\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\u003eThis thermostat and knob kit is a direct OEM fit for the Tempstar THB12R25STA PTAC. It is supplied under the ICP\/Heil\/Tempstar family and is the factory-specified control for this model. Confirm your unit's model and serial tag 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 to the PTAC at the wall plug or 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 front grille and control-panel cover to reach the thermostat assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wire positions and the knob orientation before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull off the old control knob, disconnect the thermostat leads, and unfasten the thermostat body from the chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new thermostat (1058517), reconnect the leads per your photo, and press the new knob (1058437) onto the shaft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, set the knob through its range, and confirm the unit cycles correctly in both cool and heat modes.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnit runs constantly or never reaches the set temperature.\u003c\/li\u003e\n\u003cli\u003eNo response when turning the control knob.\u003c\/li\u003e\n\u003cli\u003eShort-cycling — compressor turns on and off rapidly.\u003c\/li\u003e\n\u003cli\u003eCracked, stripped, or missing control knob.\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. National HVAC Parts fitment guarantee — backed by exact-fit OEM sourcing for your Tempstar PTAC.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021637828979,"sku":"1058437-GEN","price":54.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048485601651,"sku":"1058437","price":71.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-thermostat-nonprogrammable-1058437_4447373d-de3c-4d22-9044-ff51db4aa6bc.jpg?v=1782961231","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-ptac-thermostat-for-thb12r25sta-knob-control-kit-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}