Why Is My Light Switch Not Working? Common Problems and Repair Solutions A light switch that suddenly stops working can be caused by a tripped breaker, loose wiring, a worn switch, or another electrical problem. While some switch issues are simple, others can point to a larger safety concern. Read more. https://payhip.com/mrelectriclittleton/blog/electrician/why-is-my-light-switch-not-working-common-problems-and-repair-solutions