A toilet that keeps running may have a worn flapper, an incorrectly adjusted fill valve, a float problem or a chain that does not move freely. The sound may continue after flushing or start again when the tank refills. A running toilet can waste water, so it is worth investigating. You can observe the tank's normal operation, but do not force old parts or fittings. If the toilet leaks around its base or overflows, stop using it and seek professional help. Note whether the issue happens after every flush or intermittently. For toilet repair inquiries in Los Angeles, call +1 (866) 569-0263 with your ZIP code and a brief description. We can discuss the issue and confirm whether the service is offered in your area.