{"product_id":"tempstar-safety-thermostat-for-tnls2035hde-oem-limit-switch-ships-today","title":"Tempstar Safety Thermostat for TNLS2035HDE — OEM Limit Switch | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM safety thermostat (part 51302031100, \"TSTAT SAFETY\") is the temperature-limit protection switch for your Tempstar TNLS2035HDE. It is a snap-disc style control that monitors a critical temperature and opens the circuit if a high-limit condition is reached, protecting the compressor, coil, and electrical components from damage caused by overheating or abnormal operating conditions. When this safety fails open it can prevent the system from running at all; when it sticks closed it removes a key layer of protection. Replacing a faulty safety thermostat restores correct cutout behavior and keeps the unit operating within its design limits.\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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e51302031100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eSafety \/ Limit Thermostat (Snap-Disc)\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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eHigh-Limit Temperature Protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Circuit\u003c\/td\u003e\n\u003ctd\u003e24V\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 safety thermostat for the Tempstar TNLS2035HDE and matching ICP\/Heil\/Comfortmaker units. Confirm the trip temperature and terminal style against the part you are removing.\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 and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel to reach the safety thermostat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the wire connections and mounting location.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads, unfasten the switch from its mounting surface, and note its orientation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new safety thermostat in the same position and reconnect the leads per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm the system completes a normal cycle without nuisance tripping.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnit will not start or trips out on a safety\/limit fault.\u003c\/li\u003e\n\u003cli\u003eIntermittent shutdowns during normal operation.\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity test at room temperature.\u003c\/li\u003e\n\u003cli\u003eVisible burning, corrosion, or cracked disc housing.\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":63021633306995,"sku":"51302031100-GEN","price":32.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048487698803,"sku":"51302031100","price":41.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-limit-switch-snap-disc-51302031100_2857014b-cc6b-4a1a-a685-c53c38defb38.jpg?v=1782961322","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-safety-thermostat-for-tnls2035hde-oem-limit-switch-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}