Why does the bathroom heater light sometimes come on and sometimes not come on?

1. It may be that the wire is disconnected somewhere; it is recommended to check the wire connector at the connection first.
2. It may be that the wire is thin, the bathroom heater has high power, the wire is not thick enough, and it is overheating; it is recommended to change the wire.
3. Consider whether there is a short circuit, or high-power electrical appliances are used at the same time; it is recommended not to use it, it is very dangerous.