What should I do if the Yuba switch fails and the light can't be turned off?

Is it burnt out? Turn off the power and take it apart.

Find the idle switch in the bathroom and see if there is any problem.

Lamp-heated Yuba refers to a small bath household appliance, whose functions are heating, ventilation and lighting. It is heated by two or four 275W hard-working explosion-proof bulbs, and the effect is concentrated and strong. It can be heated as soon as the light is turned on, without preheating, and has multiple functions.