{"product_id":"tempstar-low-temp-ptac-thermostat-for-thb09k25dca-24v-ships-today","title":"Tempstar Low Temp PTAC Thermostat for THB09K25DCA — 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM thermostat package is the complete 24V temperature control for the Tempstar THB09K25DCA PTAC heat pump. It includes the PTAC thermostat body (OEM 1058517), the low-temperature cutout thermostat (OEM 1059022), and the control knob (OEM 1058437). The main thermostat maintains the room setpoint while the low-temp thermostat protects the unit by interrupting operation when coil or ambient temperatures fall too low — preventing coil freeze-ups and compressor damage. A failure in either control can leave the unit unresponsive, freezing the coil, or running without temperature regulation. This set restores full, protected comfort 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 (TSTAT PTAC), 1059022 (TSTAT LOW TEMP), 1058437 (KNOB TSTAT PTAC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003ePTAC Thermostat + Low-Temp Cutout with Knob\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003ePTAC Heat Pump \/ Air Handler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eTHB09K25DCA\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 replacement for the Tempstar THB09K25DCA PTAC heat pump. The thermostat, low-temp cutout, and knob are shared across the Heil\/ICP THB09K25 PTAC family. Confirm your existing OEM part numbers 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 unit and breaker; verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the front grille and service panel to reach the control area.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photo all thermostat and low-temp cutout wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Pull the old knob, disconnect the thermostat and low-temp leads, and unclip both controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new thermostat and low-temp cutout, reconnect per your photo, and press on the knob.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm proper setpoint response and low-temp protection.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCoil ices over during low-temperature operation.\u003c\/li\u003e\n\u003cli\u003eUnit will not respond to the temperature knob.\u003c\/li\u003e\n\u003cli\u003eCompressor short-cycles or runs continuously.\u003c\/li\u003e\n\u003cli\u003eCracked, loose, 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. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021638746483,"sku":"1058437-GEN","price":48.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048466858355,"sku":"1058437","price":62.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-thermostat-nonprogrammable-1058437.jpg?v=1782960601","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-low-temp-ptac-thermostat-for-thb09k25dca-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}