{"product_id":"oem-lennox-100503-15-thermostat-spst-70-f-open-50-f-15y64","title":"OEM Lennox 100503-15 Thermostat SPST 70°F Open 50°F — 15Y64","description":"\u003cp\u003eThe \u003cstrong\u003eLennox 15Y64\u003c\/strong\u003e is a genuine OEM single-pole single-throw (SPST) thermostat (part number 100503-15) that opens at 70°F and closes at 50°F, commonly used for freeze protection and temperature-limit control in Lennox HVAC equipment. This thermostat acts as an automatic temperature-actuated switch, protecting system components from damage caused by low-temperature conditions by enabling or disabling circuits at its factory-set thresholds. If your Lennox system is experiencing nuisance shutdowns, failure to activate freeze protection, or erratic low-temperature control behavior, replacing this thermostat with the OEM 15Y64 ensures reliable and accurate switching performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081028845939,"sku":"LNX-15Y64","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-100503-15-thermostat-spst-70-f-open-50-f-15y64","provider":"National HVAC Parts","version":"1.0","type":"link"}