The reason why the electric heating tube does not generate heat after being energized. The main points are as follows:
1, the resistance wire is disconnected
2. The lead rod and the resistance wire are not connected.
3, power supply is abnormal or power outage
4, the fuse has been blown;
5. The power cord plug is not in good contact with the electric hot socket, or the power cord is disconnected;
6. The contact of the temperature controller is poorly contacted or melted and disengaged.