Thermostat, 44-86F, with thermometer locking cover and range stops. Horizontal/vertical. Light and medium duty line voltage thermostats control line voltage valves, motors, contactors, electric heat, elements, duct furnaces, and fan coil units in heating/cooling systems. Automatic cooling and heating anticipation. Mount on standard vertical or horizontal outlet box. Includes vertical scale plate with thermometer, horizontal scale plate with no thermometer, range stops and locking screws, wall plate, and high-accuracy dual diaphragm sensor.