If the infrared sensor switch doesn't work, how to fix it? Because I am a property, there are many switches, all of which are like this. Please give me advice.

The frequency of infrared switch failure is relatively high. As you can see from the picture, you are the relay inside the switch. If you don't act, you have to divide it into three parts.

First of all, the relay is broken

Second, the power supply is partially cut off and there is no power supply (internal).

Third, the probe is broken and can't be detected.

No matter which part of the bad property is unprofessional, it cannot be repaired. The only way is to return it to the manufacturer, who will provide maintenance.

Lv Qing-Provide LED induction lamp and inductive switch for real estate and property.