The answer to 'how to replace switch' is to replace a broken or outdated light switch in your home. This is a relatively simple DIY project that most homeowners can do themselves with a few basic tools. However, it's important to take the necessary safety precautions and turn off the power to the switch before starting any work.
To replace a switch, first turn off the circuit breaker that controls the switch you'll be working on. Use a voltage tester to confirm the power is off, then unscrew the switch from the electrical box and disconnect the wires. Install the new switch, reconnect the wires, and secure the switch back into the box. Finally, turn the power back on and test the new switch to ensure it's working properly.