Can a water softener cause toilets to overflow?

Yes, a water softener can indirectly cause toilets to overflow if there is a malfunction or blockage in the Plumbing system. If the softener is not functioning properly, it may lead to increased water pressure or backflow issues. Additionally, if the softener adds too much salt to the water, it can affect the toilet's flushing mechanism. Regular maintenance and monitoring of the water softener can help prevent such issues.