Johnson Controls A19AAA-1 SPST Temperature Control 6" Open/Low 6' Differential -30°F/50°F

The Johnson controls A19AAA-1 SPST Temperature control is a switch that is used to regulate the temperature in heating, ventilating and air conditioning systems in homes and offices. This remotely functions like a thermostat in the manner that it either turns on the heating or cooling equipment whenever the temperature reaches that in the room floored. The switch itself has two key settings: a set point temperature and a differential. The set point temperature is simply what you would wish the temperature of the space to be at a particular time. The differential is a range around the set point; when the room temperature is below the set point by the differential value, the switch turns on the heating system.