Answer

A burnt-out main breaker typically results in a complete power loss to your home. Common causes include loose connections at the switch, internal wear and tear, excessive electrical loads, over-torqued terminals, and short circuits. Loose connections can lead to overheating, as increased resistance generates heat, which further escalates resistance, potentially causing electrical fires. Over time, components may degrade, especially in older homes, leading to similar issues. Exceeding the breaker's capacity can also cause overheating and burnout. Over-tightening terminals can damage the switch, and short circuits may result in immediate failure. Regular maintenance and inspections by qualified electricians can help prevent these problems.

You can read more about this in our article here: https://www.electricalfaultsfixed.com/blog/main-breaker-switch-burnt-out-why-how-what-do