The answer to 'my humidifier keeps shutting off' is that there are several common causes, including a malfunctioning humidistat, a clogged water line, or a problem with the humidifier's internal components. This can result in symptoms like the humidifier cycling on and off frequently or shutting off completely.
Some potential solutions you can try yourself include cleaning the water line and checking the humidistat settings. However, if the issue persists or you're not comfortable troubleshooting the problem, it's best to call in a professional HVAC technician to diagnose and repair the humidifier properly.