The answer to 'my dehumidifier keeps shutting off' is that there are several common causes, including a clogged air filter, a full water tank, or a malfunctioning thermostat or humidistat. This can lead to symptoms like the dehumidifier turning on and off repeatedly or not running at all.
Some simple DIY troubleshooting steps you can try include cleaning or replacing the air filter, emptying the water tank, and checking the settings on the dehumidifier's controls. However, if the issue persists or you're unsure of the cause, it's best to call a professional HVAC technician to diagnose and repair the problem.