{"product_id":"tempstar-ptac-thermostat-knob-control-kit-for-thb09k50sta-24v-ptac-ships-today","title":"Tempstar PTAC Thermostat Knob \u0026 Control Kit for THB09K50STA — 24V PTAC | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the OEM thermostat and knob assembly for the Tempstar THB09K50STA packaged terminal air conditioner (PTAC). It includes the 24V PTAC thermostat (OEM 1058517) and the matching control knob (OEM 1058437). The thermostat senses room temperature and cycles the compressor and heater contactor to maintain the setpoint. A failed or worn PTAC thermostat is one of the most common service calls on hotel, apartment, and assisted-living PTAC units — the room will stop holding temperature, short-cycle, or refuse to switch between heat and cool. Replacing it with the correct OEM part restores accurate, reliable temperature control without guesswork on calibration.\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)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKnob Part Number\u003c\/td\u003e\n\u003ctd\u003e1058437 (KNOB TSTAT PTAC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eMechanical PTAC Thermostat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar \/ Heil \/ ICP\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\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eTHB09K50STA\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 OEM fit for the Tempstar\/Heil\/ICP THB09K50STA PTAC. The thermostat and knob are sold together so the assembly indexes and reads correctly after installation. Always confirm your unit's model and serial tag 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 PTAC plug 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 and control panel cover to reach the thermostat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wire positions and the knob orientation before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the knob, release the thermostat mounting clip\/screws, and disconnect the 24V leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new thermostat, reconnect leads per your photo, and press on the new knob so the index aligns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and verify the unit responds to setpoint changes in both heat and cool.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRoom temperature drifts well past the setpoint or never satisfies.\u003c\/li\u003e\n\u003cli\u003eUnit short-cycles or fails to start the compressor.\u003c\/li\u003e\n\u003cli\u003eKnob spins freely, is cracked, or no longer indexes to the dial.\u003c\/li\u003e\n\u003cli\u003eNo switching between heating and cooling modes.\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":63021638353267,"sku":"1058437-GEN","price":64.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048486551923,"sku":"1058437","price":83.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-thermostat-nonprogrammable-1058437_98681116-0e33-4e2d-87b7-efa577c08d1e.jpg?v=1782961274","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-ptac-thermostat-knob-control-kit-for-thb09k50sta-24v-ptac-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}