Why is My Dehumidifier So Loud?

Having a loud dehumidifier can be an annoyance, especially if you value the serenity of your living space. From fan blades causing unusual noise to a faulty compressor contributing to excessive noise, various factors could be at play.

This guide will cover everything you need to know about identifying the issue and possible solutions. Let’s silence the annoying noise and make your dehumidifier quieter.

How to Diagnose a Loud Dehumidifier

To diagnose a noisy dehumidifier, first, identify the source of noise. The problem could lie in various parts such as the fan motor, dehumidifier compressor, or blower wheel.

Listen for specific sorts of noises like buzzing, clicking, or gurgling that could point to specific issues. Check the dehumidifier for loose screws, uneven surface placement, or a dirty filter, which are common causes of a loud noise.

10 Ways to Fix a Loud Dehumidifier

  1. Clean the Air Filters: Over time, air filters accumulate dust and debris which may obstruct normal operations and cause a humming noise. Regular cleaning can prevent this.
  2. Check the Fan Motor: A damaged or faulty fan motor can create an excessive raw noise output. If the fan motor is the problem, consider replacing it.
  3. Adjust Fan Speed: If the fan speed is set too high, it can result in loud sounds. Try reducing the speed.
  4. Clean the Dehumidifier: Dust and grime accumulation on the evaporator coils, condenser coils, or fan blades can lead to noise during operation. Regular cleaning can fix this issue.
  5. Secure Loose Screws: Check for any loose screws around the unit. Tightening them can reduce the noise.
  6. Check the Water Tank: If the water tank isn’t properly placed, it can cause a rattling sound. Ensure it’s securely positioned.
  7. Inspect the Drain Hose: If the drain hose is clogged, it can cause a gurgling noise. Clean the hose to fix this.
  8. Level the Dehumidifier: An uneven surface can cause vibration and loud noise. Ensure your dehumidifier is on a flat, stable surface.
  9. Inspect the Fan Bearing: A worn-out fan bearing can create a loud, disturbing noise. If this is the issue, replacement might be necessary.
  10. Check the Compressor: A faulty compressor can create a loud, buzzing noise. If this is the problem, a professional may need to repair or replace it.

5 Ways to Make Your Dehumidifier Quieter

  1. Use a White Noise Machine: This can help to drown out the noise from the dehumidifier.
  2. Place on a Sound-absorbing Mat: This can help to reduce the vibrations, making the dehumidifier quieter.
  3. Consider Upgrading: Some of the quietest dehumidifiers on the market produce less noise due to advanced technology.
  4. Insulate the Room: Soundproofing the room can help to reduce noise.
  5. Regular Maintenance: Routine maintenance can prevent a lot of noise issues before they start.

Are All Dehumidifiers Noisy?

Not all dehumidifiers are noisy. Some models are designed to be quiet during operation, such as the quietest dehumidifiers available on the market. It’s essential to research and consider noise output when purchasing a dehumidifier.

What Does it Mean if My Dehumidifier is Making Noises While Off?

If your dehumidifier is making noise while off, it might be due to excess water in the water bucket or an issue with the fan blades. If the noise persists, consider seeking professional help.

How to Soundproof a Dehumidifier?

To soundproof a dehumidifier, you can use a soundproof box or enclosure, place the dehumidifier on a sound-absorbing mat, or soundproof the room where the dehumidifier is located. Regular maintenance and cleaning can also reduce the noise.


A loud dehumidifier can be a nuisance, disrupting your peace and quiet. However, with the right approach and maintenance, you can reduce the noise and extend the lifespan of your dehumidifier.

Whether it’s a noisy dehumidifier or a quiet dehumidifier, proper care and maintenance can ensure optimal performance and noise control. Remember, if the problem seems too complex or the noise continues, don’t hesitate to seek help from a professional HVAC service.

About Roy Cohen

Roy Cohen has a burning passion for heating, cooling, and ventilation. He aims to help you save money on expensive repairs and bring you the best HVAC products. He has years of experience behind him in HVAC repair and garage maintenance.

You can find Roy at his LinkedIn or his email: [email protected]

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