The answer to 'how to replace circuit breaker' is to turn off the main power, identify and remove the faulty circuit breaker, install the new circuit breaker, and test the new circuit. This process involves shutting off power, safely removing the old breaker, installing the new one, and verifying it's working properly.
Before starting, make sure to turn off the main power to the home at the main service panel. This ensures you can work safely without risk of electrical shock. Next, locate the faulty circuit breaker in the service panel. It may be tripped or labeled as the problem circuit. Use a screwdriver or circuit breaker tool to firmly remove the old breaker. Install the new replacement breaker, making sure it clicks into place securely. Finally, turn the main power back on and test the new circuit breaker to ensure it's working correctly.