The answer to 'switch replacement schedule' is that most standard light switches and electrical wall switches should be replaced every 10-15 years, or sooner if they start malfunctioning. Switches can wear out over time due to normal use, especially if they control high-traffic areas or are used frequently. Replacing old, damaged, or outdated switches helps ensure your home's electrical system is safe and functioning properly.
It's generally recommended to inspect all switches in your home every few years and replace any that are cracked, loose, or not working reliably. Switches are relatively inexpensive and easy for a qualified electrician to replace, so it's a good idea to stay on top of this basic home maintenance task.