The answer to 'why is my dehumidifier leaking water' is that a leaking dehumidifier is a common problem with several potential causes. The most likely reasons are a clogged drain, a full water collection tank, or a problem with the dehumidifier's internal components.
A clogged drain can prevent the collected water from properly draining, causing it to overflow and leak out of the unit. The water collection tank may also be full, causing the excess water to leak out. Additionally, issues with the compressor, fan, or other internal parts can lead to water leaks.