Then use a voltage tester to make sure that the circuit is dead.
How to fix a wall light switch.
Once the power is cut remove the switch cover and mounting screws with a screwdriver and pull the old switch from the wall.
You can test the switch with a voltage tester to determine which is the problem.
If a light switch won t turn off it could be because it s miswired or just a bad switch.
You may also want to use a circuit tracer to identify the circuit breaker or fuse you need to turn off.
To replace a light switch start by disconnecting the power to the switch by shutting off the breaker for the room.
Turn off the power to the switch at the main circuit breaker or fuse panel.
Before you do any work on a switch make sure power is turned off at the electrical panel.
Unscrew and remove the switch plate.
The single pole toggle switch is still the most popular.
How to troubleshoot a faulty wall switch.
The moving parts of a standard light switch are enclosed inside plastic casing so when the switch goes bad your only option is to replace it.
If the switch is bad you should replace it because you can t fix it.
To replace this kind of switch follow these steps.
If the switch is miswired it s easy to rewire.
When a switch stops switching then it s time to troubleshoot and repair or replace the switch.