Cuisine 11 May, 2026

When to Replace Your Kitchen Hood? Signs to Watch For

L'Entrepôt de la Réno Published on May 11, 2026

7 min read

Quand changer sa hotte de cuisine? signes à surveiller

Is your kitchen hood noisier than before? Do cooking odors linger long after meals? Are you wondering if this is normal or if it's time to replace it? Many owners ignore the signs that a hood is nearing the end of its life and continue using it even though it no longer performs its role.

This article explains how to recognize these warning signs and know when a simple cleaning is enough or when replacement is necessary.

Key points to remember

A well-maintained hood can last between 10 and 20 years, but some signs indicate it should be replaced sooner
Abnormal noises, reduced suction, and persistent odors are the three main signs of malfunction
Clogged or saturated filters often cause problems before the hood itself fails
A simple test with a sheet of paper quickly checks if your hood is still suctioning properly
Replacement becomes necessary when the motor shows signs of weakness or repairs are too costly

What a kitchen hood really does

Your hood is not just for removing bad odors. It eliminates smoke, airborne grease, excess humidity, and contaminants produced during cooking. Without it, these pollutants accumulate in your home's air and settle on your furniture, walls, and ceilings.

A well-functioning kitchen hood has an average lifespan of 9 years. With regular maintenance and quality components, the best models can last between 10 and 20 years.

The hood operates in two modes. The external venting mode sends stale air outside through a duct. The recirculation mode filters the air and sends it back into the kitchen. The first is more effective; the second is suitable when external venting is not possible.

When a hood weakens, it can no longer perform its functions. Result: your kitchen smells bad, humidity builds up, and grease sticks everywhere.

Signs that it's time to replace your hood

Abnormal noises that get worse

A little noise at startup is normal. But if your hood makes popping, squeaking, or worsening vibrations, something is wrong.

These noises can come from several sources: a stuck check valve that slams with each cycle, a worn turbine rubbing, loose screws vibrating, or a motor wearing out. Sometimes, a simple tightening or cleaning fixes everything. Other times, the motor is at the end of its life.

If noise persists after a thorough cleaning and tightening all screws, it’s a bad sign. A motor that growls or makes metallic noises is close to failing.

Weak suction even at maximum power

Your hood runs at full speed but cooking fumes remain in the kitchen? That’s the clearest sign of a problem.

Test the suction with a simple method: hold a sheet of paper towel against the bottom of the hood while it’s running. If the paper sticks, the suction is still working. If it falls, your hood has lost power.

Check the filters first. Dirty filters block airflow and reduce efficiency. If cleaning or replacing the filters doesn’t help, the problem is with the hood itself.

Odors that persist after cooking

Are you cooking fish and the smell lingers in the house for hours? That is not normal if your hood is working properly.

For recirculation hoods, the charcoal filter captures odors. These filters have a limited lifespan and must be replaced regularly. A saturated filter can no longer absorb odors. For external venting hoods, persistent odors indicate either a blockage in the duct or a loss of suction power.

Visible grease deposits around the hood

If you see grease accumulating on your cabinets, walls, or ceiling near the hood, it means the filters are no longer doing their job or the suction is insufficient.

Metal filters capture grease. When they are saturated, grease passes through and deposits everywhere. Clean filters let almost nothing through.

Filter problems vs hood problems

Before replacing your hood, make sure that the problem is not simply due to the filters.

Metal filters

These filters capture grease. They must be cleaned at least once a month if you cook regularly. You can wash them by hand with dish soap or run them through the dishwasher.

Clogged filters reduce suction and force the motor to work harder, which increases noise and prematurely wears out the hood.

Charcoal filters

For recirculation hoods, these filters remove odors. They cannot be cleaned and must be replaced every 3 to 6 months depending on use. A saturated charcoal filter no longer filters anything. Odors remain in the kitchen and the motor works harder to push air through a clogged filter.

If your hood works well after replacing the filters, you have avoided an unnecessary replacement. If problems persist with new filters, the hood itself is the cause.

When you really need to replace the hood

Situation	What it means	What to do
Loud noises after full cleaning	Worn motor or turbine	Request a professional evaluation or replace
Weak suction with new filters	Loss of motor power	Replace the hood
Persistent odors despite new filters	Filtration system failure	Replace the hood
Age 15 years or more	Normal end of life	Plan replacement
High repair cost	Repair not cost-effective	Replace with a new model

What you need to do now

If you notice any of the mentioned problems, here are the steps to follow.

Clean the metal filters first. Remove and wash them thoroughly. Dry them well before putting them back. Test the hood after cleaning.

Replace charcoal filters if your hood uses them. These filters don’t last forever. If you don’t remember the last time you changed them, it’s time to do so.

Check all screws and fasteners. Tighten anything that moves. A simple screwdriver turn can eliminate vibration noises.

Best practices to extend the life of your hood

A well-maintained hood lasts much longer than a neglected one.

Wipe the outside of the hood regularly to prevent sticky grease buildup. Also clean the inside if you have access.

Use the hood every time you cook, even for simple cooking. Let it run a few minutes after turning off the burners to completely remove residual vapors.

Check the exhaust duct once a year if you have an externally vented hood. A blocked duct reduces efficiency and forces the motor to work harder.

Your kitchen deserves a functional hood

A faulty hood doesn’t just make your kitchen smell bad. It affects the air quality you breathe and lets grease build up everywhere. The signs are clear: unusual noises, weak suction, persistent odors.

First check the filters and give them a good cleaning. If problems persist, replacement becomes necessary. A modern hood will be quieter, more efficient, and consume less energy.

Need help with your project?

If you are unsure between several options or want to be certain to make the right choice for your specific situation, our team can guide you.

Contact us to discuss your project.

How long does a kitchen hood last on average?

A well-maintained hood lasts between 10 and 20 years depending on build quality and maintenance. Lower-quality or poorly maintained models can break down after 5 to 7 years. Regular filter maintenance significantly extends lifespan.

Can I repair my hood myself if it makes noise?

You can clean the filters, tighten the screws, and check the backdraft damper yourself. These actions often fix minor noises. However, if the motor or turbine is damaged, call a professional to avoid worsening the problem.

How often should I replace the charcoal filters?

Charcoal filters should be replaced every 3 to 6 months depending on how intensively you use your hood. If you cook daily with a lot of frying or strong-smelling cooking, replace them every 3 months. For occasional use, 6 months is sufficient.

My hood has poor suction but makes no noise, is it serious?

Yes, it's a sign that the motor is losing power. First, check that the filters are clean and the duct is not blocked. If everything is clear and the suction remains weak, the motor is nearing the end of its useful life.

Is it better to repair or replace an old hood?

If your hood is over 15 years old and the repair requires expensive parts, replace it. Recent models are more efficient, quieter, and consume less energy. A major repair on an old model is often not cost-effective.