The answer to 'how to replace dimmer switch' is to turn off power at the circuit breaker, remove the existing dimmer switch, install the new dimmer switch, and restore power. Replacing a dimmer switch is a relatively straightforward DIY project that most homeowners can complete with basic electrical skills and tools.
Before starting, make sure to turn off power to the circuit at the breaker box to avoid the risk of electric shock. Then, remove the existing dimmer switch by unscrewing it from the wall and disconnecting the wires. Install the new dimmer switch by connecting the wires to the appropriate terminals, following the manufacturer's instructions. Once the new switch is in place, restore power at the breaker and test the dimmer to ensure it's working properly.