The hot runner temperature controller is a device that continuously maintains the required temperature value of the hot runner controller systems. According to hot runner controller wiring diagram, it consists of temperature control modules, an air switch, a box, a fan, a terminal block and a cable. The temperature control box detects the temperature of hot runner system through a built-in temperature control card and adjusts output power to keep the temperature target point stable. The temperature control box is controlled by a microprocessor, and the temperature control accuracy can reach 0.5 ℃; a double-row LED digital display or LCD liquid crystal display, with a variety of fault status displays and alarms, can find and solve the problem in time.