Why Is My Cooker Hood Noisy? Causes of Rattling, Whistling & Loud Noise

Issue

• Cooker hood emits rattling sounds/noises
• Cooker hood is louder than expected
• Why my cooker hood is so noisy?

Applies to

• cooker hoods

Resolution

If your cooker hood is making unusual noises - such as rattling, whistling, or being louder than usual - it’s often caused by airflow issues, worn components, or installation problems.

This guide explains the most common causes and how to fix them.

Common Reasons Your Cooker Hood Is Noisy

1. Rattling Noise from the Hood

Possible causes:

• Loose internal parts or fittings
• Debris (e.g. carbon particles from filters)
• Damaged or worn filters

When carbon filters wear out, they can break apart and create rattling sounds similar to small stones shaking inside the hood.

How to fix it:

• Inspect and tighten visible components
• Replace damaged or old filters
• Clean inside accessible areas safely

2. Whistling or High-Pitched Sound

Possible causes:

• Airflow restriction in ducting
• Air leaking through gaps
• Air blowing back from outside

Whistling typically happens when air is forced through narrow spaces or when there is backflow in the system.

How to fix it:

• Check for gaps or leaks in ducting
• Ensure the non-return valve is properly installed
• Use smooth, correctly sized duct pipes

3. Cooker Hood Is Loud at High Speed

Possible causes:

• Increased airflow and back pressure
• Long or narrow ducting
• Too many bends in ventilation pipes

Noise at higher settings is usually linked to resistance in the ventilation system.

How to fix it:

• Shorten duct length where possible
• Reduce sharp bends in the pipe
• Use larger diameter ducting

4. Noise Caused by Dirty or Worn Filters

Possible causes:

• Grease build-up restricting airflow
• Carbon filters overdue for replacement

Clogged filters force the fan motor to work harder, increasing noise levels.

How to fix it:

• Clean grease filters regularly
• Replace carbon filters every 3–4 months. Buy new filters directly in our Webshop.

5. Poor Installation or Setup

Possible causes:

• Incorrect duct size or layout
• Loose mounting
• Improper installation

Installation quality directly affects both airflow and noise levels.

How to fix it:

• Check installation against manufacturer guidelines
• Ensure the hood is securely fitted
• Consider professional installation for optimal performance

Tips to Reduce Cooker Hood Noise

• Use lower fan speeds when possible
• Turn the hood on early when cooking to avoid maximum power later
• Keep filters and ducts clean
• Choose smooth duct piping instead of flexible hoses

Higher fan power increases noise, so using the right setting for your cooking needs can make a big difference.

FAQs

Is it normal for a cooker hood to be noisy?

Yes, cooker hoods produce some noise during operation. However, loud rattling, whistling, or sudden increases in sound usually indicate an issue.

Newer models include improved insulation and quieter motors.

Browse low-noise cooker hoods designed for quieter kitchens.

Why is my cooker hood louder than before?

Common reasons include clogged filters, ducting issues, or worn components. Regular maintenance usually resolves the problem.

Why does my cooker hood make noise only at high speed?

At higher speeds, airflow increases and any ducting restriction or blockage creates more pressure and noise.

How can I make my cooker hood quieter?

• Clean or replace filters
• Improve ducting layout
• Use lower fan speeds
• Ensure proper installation

When should I contact a technician?

Contact an authorised service centre for further assistance if:

• The noise persists after cleaning and checks
• You suspect a motor issue
• There are unusual vibrations or mechanical sounds

Book a repair online

Summary

Most cooker hood noise issues are caused by:

• Restricted airflow
• Worn filters
• Poor installation

By maintaining filters, checking ducting, and using correct settings, you can significantly reduce noise and improve performance.