The answer to 'dehumidifier making noise' is that a noisy dehumidifier is usually caused by a mechanical issue, such as a loose or worn fan, compressor, or other component. Common symptoms include rattling, buzzing, or clanking sounds coming from the unit. Potential solutions include cleaning the dehumidifier, replacing the air filter, or having a professional technician inspect and repair the unit.
If the dehumidifier is making excessive noise, it's generally best to have a professional HVAC technician take a look. They can diagnose the problem and make any necessary repairs to get the unit running quietly and efficiently again. Attempting DIY repairs on a noisy dehumidifier may cause further damage and is not recommended for most homeowners.