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Look at the electric heater should turn on the fan. Turn it off after a while, it is estimated that it is overheating protection, and try it when the wind is turned on.
In this case, it is possible that the light bulb is old.
Get a new light bulb! >>>More
Disassemble the lamp and carefully inspect the circuits and joints in the lamp. The virtual connection is connected, and each joint is wrapped with insulating tape to do a good job of insulation between the joints.
First of all, consider whether there is a problem with the lamp. If there is no problem with the lamp itself, then it is considered that it cannot be contacted. >>>More
Your head is spiral, right?
If it is spiral, then it is a problem with the spring blade in the lamp holder, which is in poor contact with the lamp head. It heats up and leaves the lamp head. >>>More
If the voltage of the socket is only unstable, then most of it is caused by the poor contact between the "wire lug" screw of the socket and the wire! Tighten and solve the problem! If the screw is "slippery", you need to replace the screw or replace it with a new socket!