{"product_id":"tempstar-ptac-thermostat-kit-for-thb12r50sta-thermostat-knob-ships-today","title":"Tempstar PTAC Thermostat Kit for THB12R50STA — Thermostat + Knob | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM Tempstar PTAC thermostat kit pairs the replacement thermostat (part number 1058517) with its matching control knob (part number 1058437) for your THB12R50STA packaged terminal air conditioner. The thermostat senses room temperature and cycles the unit's heating and cooling stages to hold your setpoint, while the knob gives the user a positive, calibrated way to dial in comfort. PTAC thermostats take constant handling and wear, so a worn or cracked knob, a unit that cycles erratically, or a system that no longer responds to temperature changes usually points to a failed thermostat. Replacing both pieces together restores accurate, reliable control.\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\u003eOEM Part Numbers\u003c\/td\u003e\n\u003ctd\u003e1058517 (thermostat), 1058437 (knob)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePTAC Thermostat with Control Knob\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\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\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDirect-fit thermostat and knob for the Tempstar THB12R50STA PTAC unit and related ICP\/Heil PTAC chassis using the same control. Verify the thermostat body style and knob shaft match your existing control 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 — Unplug or disconnect power to the PTAC and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the front cover\/control panel to expose the thermostat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all thermostat wire terminals and the knob orientation before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the old knob, disconnect the thermostat leads, and unscrew the thermostat from the control panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new thermostat, reconnect each wire per your photo, and press on the new knob.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm the unit cycles heating and cooling correctly across the knob range.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnit won't respond to temperature setting changes\u003c\/li\u003e\n\u003cli\u003eErratic short-cycling or failure to reach setpoint\u003c\/li\u003e\n\u003cli\u003eCracked, stripped, or loose control knob\u003c\/li\u003e\n\u003cli\u003eThermostat contacts stuck, pitted, or burnt\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":63021637763443,"sku":"1058437-GEN","price":64.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048486486387,"sku":"1058437","price":84.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-thermostat-nonprogrammable-1058437_edcec43b-100c-45d3-b1d6-ce6ce84e65f3.jpg?v=1782961269","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-ptac-thermostat-kit-for-thb12r50sta-thermostat-knob-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}