Dehumidifiers can be safe if left on overnight. Most dehumidifiers can run overnight with relative ease. Make sure there are no errors in its path (maintenance, airflow, no blockages, no leaks). They are very safe to use overnight. The device should have an auto defrost mode, but if it overheats for any reason, it will turn off. It’s a fact of life for dehumidifiers. If you don’t want a dehumidifier to be loud, you have to pay more for a dehumidifier that is going to put out less noise.
Check out our best pick dehumidifier Whynter AC 12000 BTU.