{"product_id":"tempstar-ptac-low-temp-thermostat-kit-for-thb09k50dca-24v-ptac-ships-today","title":"Tempstar PTAC Low-Temp Thermostat Kit for THB09K50DCA — 24V PTAC | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM thermostat kit fits the Tempstar THB09K50DCA packaged terminal air conditioner (PTAC). It includes the 24V PTAC thermostat (OEM 1058517), the low-temperature thermostat (OEM 1059022), and the matching control knob (OEM 1058437). The PTAC thermostat cycles the compressor and heater to hold the room setpoint, while the low-temp thermostat protects the unit and occupants by managing operation in cold-ambient conditions. A failed thermostat is a frequent PTAC service issue — rooms stop holding temperature, short-cycle, or won't switch modes. The correct OEM parts restore accurate, protected temperature 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\u003eThermostat Part Number\u003c\/td\u003e\n\u003ctd\u003e1058517 (TSTAT PTAC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow-Temp Thermostat\u003c\/td\u003e\n\u003ctd\u003e1059022 (TSTAT LOW TEMP)\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 with Low-Temp Control\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\u003eTHB09K50DCA\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 OEM fit for the Tempstar\/Heil\/ICP THB09K50DCA PTAC. The thermostat, low-temp control, and knob ship together so the assembly reads and indexes correctly after install. Verify your 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wiring, sensor routing, and knob orientation before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the knob, release the thermostat and low-temp control mounts, and disconnect the 24V leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new thermostat and low-temp control, reconnect per your photo, and press on the new knob aligned to the index.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm the unit responds in both heat and cool and that low-temp protection functions.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRoom overshoots or never satisfies the setpoint.\u003c\/li\u003e\n\u003cli\u003eCompressor short-cycles or fails to start.\u003c\/li\u003e\n\u003cli\u003eUnit malfunctions in cold-ambient (low-temp) conditions.\u003c\/li\u003e\n\u003cli\u003eKnob is cracked, spins freely, or won't index.\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":63021638418803,"sku":"1058437-GEN","price":72.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048470659443,"sku":"1058437","price":93.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-thermostat-nonprogrammable-1058437_b23919fa-ec0a-44bd-a836-385374bc3ec5.jpg?v=1782960731","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-ptac-low-temp-thermostat-kit-for-thb09k50dca-24v-ptac-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}