Schneider Electric (Barber Colman) TC-1191 2-Position SPDT Thermostat

The Schneider Electric (Barber-Colman) TC-1191 2-Position SPDT Thermostat (55°F–85°F, Heat/Cool) is a mechanical temperature control device that regulates HVAC operation by switching between heating and cooling based on ambient temperature. It works by sensing room temperature and activating its single-pole, double-throw contacts to engage appropriate system stages. Used in air handlers, heat pumps, furnaces, and packaged units, it enhances occupant comfort, simplifies temperature management, and supports efficient system cycling with reliable, intuitive control in residential and light commercial environments.