Why does your central locking only work for 2 doors?

If your central locking only works for two doors, it may be due to a malfunctioning actuator in the other doors, a blown fuse, or a wiring issue. The actuator is responsible for locking and unlocking the doors, and if it fails, that door won't respond. Additionally, check for any problems with the central locking system's control module. Inspecting the wiring and components for damage or corrosion can also help identify the issue.