The answer to 'how to replace switch' is to turn off the power to the switch, remove the old switch, connect the wires to the new switch, and secure the new switch in place. This process typically takes 15-30 minutes and requires basic electrical skills. Always turn off power before working on any electrical components to avoid the risk of shock.
When replacing a switch, make sure to match the new switch to the existing wiring and electrical box. Label the wires before removing the old switch, and take a photo for reference. Connect the wires to the new switch in the same configuration, ensuring a secure and safe connection. Tighten the screws to secure the new switch in the electrical box and test the switch to ensure it is working properly.