Cooker Hood Not Working - Common Faults and How to Keep Yours Running in Worksop

Published September 2026 | Cooker Hood Not Working Common Faults

How Long Should a Cooker Hood Last and What Affects That

A well-maintained cooker hood should give you a solid decade of reliable service, and many go well beyond that. Our engineers regularly see units from Bosch, Hotpoint, and Beko still running efficiently after 12 to 15 years when they've been looked after properly. On the other hand, a neglected hood in a busy Worksop kitchen can start throwing up serious problems within five or six years.

Several factors determine how long yours will hold up:

Cooking habits make the biggest difference. If you're frying, grilling, and cooking heavily spiced meals regularly, your hood works harder and accumulates grease faster than one above a hob used mainly for boiling pasta. The motor, filters, and ducting all take more strain in high-use kitchens.

Build quality varies enormously across brands. Budget hoods from lesser-known manufacturers often use cheaper motors that are difficult to source parts for when things go wrong. Mid-range units from Hotpoint, Beko, or Indesit tend to hit a sweet spot of affordability and repairability. Higher-end Bosch and Neff hoods are built to last, and their components are widely available across Nottinghamshire.

Ventilation type also matters more than most homeowners realise. Ducted hoods, which push air outside through a duct, generally last longer than recirculating models because they don't rely on carbon filters that need replacing every few months. If your recirculating hood's carbon filters have been ignored, the motor works harder to pull air through a blocked medium, shortening its life considerably.

Installation quality is underestimated as a factor. A hood fitted at the wrong height above the hob, with inadequate ducting, or with restricted airflow at the outlet will never perform as intended and will fail earlier than it should.

The Maintenance That Actually Makes a Difference

Most cooker hood faults our engineers attend in Worksop and across Nottinghamshire are caused by one thing: ignored filters. It's not glamorous advice, but cleaning your grease filters regularly is the single most effective thing you can do to extend your hood's working life.

Here's what maintenance actually involves and why each step matters:

1. Grease filter cleaning - Metal mesh filters should be cleaned every four to six weeks if you cook regularly. Soak them in hot water with washing-up liquid, or run them through the dishwasher on a hot cycle. A clogged filter forces the motor to work harder, generating heat that wears out bearings and motor windings far faster than normal use would.
2. Carbon filter replacement (recirculating hoods only) - These cannot be cleaned. Replace them every three to four months depending on how much you cook. Using your hood without a functional carbon filter doesn't just leave cooking smells in the kitchen - it allows grease-laden air to be pushed back into the motor housing, coating internal components.
3. Fan and motor inspection - Once a year, have an engineer check the fan blades for grease buildup and the motor for early signs of bearing wear. A motor that's starting to struggle will typically make a grinding or rattling noise before it fails completely, giving you a repair window before a full replacement becomes necessary.
4. Ducting check - External ducting can accumulate grease deposits over time. In older Nottinghamshire properties with longer duct runs or multiple bends, this can significantly reduce airflow. A restricted duct means the fan is working against resistance every single time it runs.
5. Light fitting maintenance - Bulbs are simple to replace, but check the light housing itself for grease infiltration. Grease around electrical connections is a fire risk and can cause intermittent faults that are much harder to diagnose later.
6. Exterior cleaning - Grease vapour settles on the hood's exterior surfaces, particularly around the edges and control buttons. Wiping it down weekly with a kitchen degreaser prevents it working its way into switches and push-button mechanisms, which is a common source of control faults in older units.

Warning Signs It Is Reaching End of Life

Knowing when a cooker hood is genuinely declining helps you plan ahead rather than being caught out by a sudden failure. Our engineers use the Voltrade GoFIX diagnostic tool to assess these symptoms accurately, but there are signs any homeowner can watch for between service visits.

Reduced suction is the most common complaint we hear. If your hood used to clear steam from boiling pots quickly and now takes twice as long, the motor is losing power. Sometimes this is simply dirty filters - but if cleaning makes no difference, the motor is likely worn and losing efficiency.

Persistent noise changes tell you a great deal about what's happening inside the unit. A new knocking, grinding, or high-pitched whining sound suggests the fan bearings are worn. This is often repairable, but left unchecked it will progress to a seized motor and a much larger repair bill.

Lights failing repeatedly can mean more than just bulbs reaching the end of their life. If you're replacing bulbs every few months, check whether heat from the hob is being drawn up into the light housing because the fan isn't drawing air properly. It's a symptom of a broader airflow problem.

Control panel faults - buttons that don't respond, speed settings that stick, or a hood that won't switch off without cutting the power - are common on hoods that are eight or more years old. Electronics degrade over time, and moisture and grease penetration accelerate this process considerably.

Burning or unusual smells are a serious warning sign. A burning electrical smell from the hood itself, not from whatever you're cooking, means the motor or wiring is overheating. Switch it off and don't use it until an engineer has looked at it.

Visible corrosion on ducting, inside the motor housing, or on filter frames indicates moisture has been getting in. This typically happens with hoods above island hobs where steam dynamics are different, or in properties where the external duct outlet hasn't been properly weatherproofed.

Repair vs Replace - The Honest Calculation

When a cooker hood develops a serious fault, the repair-versus-replace decision comes down to a few clear factors. As a general guide, if the repair cost exceeds 50 percent of what a comparable new unit would cost installed, replacement usually makes more financial sense.

Here's what common repairs typically cost at current UK rates:

• Motor replacement - typically 80 to 150 pounds for the part, plus one to two hours of labour. Total cost commonly falls between 150 and 260 pounds depending on the model and motor availability.
• Control board replacement - parts range from 40 to 120 pounds. Some boards for older or discontinued models are no longer available, which forces a replacement decision regardless of the hood's age.
• Fan blade replacement - usually a minor repair, typically between 60 and 100 pounds all in.
• Ducting repairs or rerouting - variable, but a simpler fix in a Worksop terraced house might cost 80 to 150 pounds; more complex work in properties with longer duct runs or difficult access will cost more.

Against these costs, a decent replacement hood runs from around 150 pounds for a basic recirculating model up to 400 to 600 pounds for a quality ducted unit from Bosch or Neff, plus installation costs of typically 80 to 150 pounds from a qualified fitter.

The case for repair is strongest when the hood is under ten years old, parts are readily available, the fault is mechanical rather than electronic, and the rest of the unit is in sound condition. The case for replacement grows stronger when the hood is over twelve years old, multiple components are failing, parts are discontinued, or the repair cost approaches that 50 percent threshold.

One pattern our engineers in Worksop see regularly is homeowners repairing an old hood only to have a second fault appear a few months later. If the overall condition is poor, it's often more economical to replace it and start fresh rather than chasing faults through an ageing unit.

Annual Service - What It Should Include

A cooker hood doesn't come with the same annual service expectation as a boiler, but a yearly check by an appliance engineer pays for itself in prevented failures and extended lifespan. Most homeowners are surprised how much a thorough inspection picks up.

A proper annual service should cover:

1. Filter assessment and cleaning - the engineer will clean metal filters on-site or advise on carbon filter replacement if they're saturated
2. Motor performance check - measuring airflow output against the unit's rated specification to identify early decline before it becomes a fault
3. Fan blade inspection - checking for grease buildup causing imbalance, wobble, or signs of physical damage
4. Electrical connection check - loose or corroded terminals are a common source of intermittent faults that are hard to diagnose without proper testing
5. Control panel function test - cycling through all speed settings, lights, and timer functions to identify components that are starting to fail
6. Ducting inspection where accessible - checking for grease accumulation, blockages, or deteriorating seals that reduce airflow
7. Exterior duct cover check - the outlet cover should open freely when the fan runs and close fully when it stops, preventing backdraught and stopping pests from using the duct as an access point

The Voltrade GoFIX diagnostic assessment covers all of these systematically, giving you a clear picture of your hood's condition and any remedial work needed to keep it running efficiently. An annual service for a cooker hood typically costs between 60 and 100 pounds. Given that a motor replacement alone costs two to three times that amount, it's a sensible investment if you use your hob regularly.

Simple Habits That Extend the Life by Years

Beyond scheduled maintenance, everyday habits make a significant difference to how long your cooker hood lasts. None of them take much time, but they add up to years of additional service life.

Turn it on before you start cooking, not after. Running the hood two or three minutes before you light the hob allows it to reach full airflow before steam and grease vapour are being produced. This means less grease is deposited on the filters and fan blades in each cooking session, reducing the rate at which they clog.

Let it run after you finish. Leaving the hood running for five to ten minutes after you've finished cooking clears residual steam and vapour. Many Bosch and Neff hoods have an automatic run-on feature built in for exactly this reason - it's worth enabling it if yours has one.

Use the right speed setting. Running on maximum speed constantly isn't necessary for most cooking and puts unnecessary wear on the motor. Match the fan speed to what you're doing - low for gentle simmering, medium for most everyday cooking, high for heavy frying or grilling. Your motor will thank you for it.

Clean the exterior regularly. Grease that settles on the hood's exterior will work its way into switches and ventilation gaps if left to accumulate. A weekly wipe-down with a kitchen degreaser takes a couple of minutes and prevents a surprising amount of long-term damage to controls and housings.

Check the duct cover seasonally. In Nottinghamshire, where autumn and winter weather can be damp and unpredictable, the external duct cover can become stiff, corroded, or partially blocked with debris. A cover that doesn't open properly means your fan is working against resistance every time it runs, straining the motor unnecessarily.

Don't ignore early warning signs. A slightly noisier fan or marginally reduced suction are easy to dismiss as normal wear. In our experience, these early symptoms cost far less to address than the complete motor failure that typically follows if they're left alone for a season or two.

Maintenance Questions

How often should I clean my cooker hood filters in Worksop?

For a typical household in Worksop cooking five or more times a week, metal grease filters should be cleaned every four to six weeks. If you cook less frequently, every two months is usually sufficient. Carbon filters in recirculating hoods cannot be cleaned and should be replaced every three to four months. Running your hood with blocked or saturated filters is the fastest way to shorten the motor's life, as it has to work against constant resistance.

Why is my cooker hood making a rattling noise when it runs?

A rattling noise from a cooker hood is commonly caused by one of three things: a loose screw or panel vibrating when the fan runs, grease buildup on the fan blades creating an imbalance, or worn motor bearings. The first two are simple to fix. Worn bearings will get progressively worse over time and will eventually seize the motor entirely, so it's worth having an engineer inspect it sooner rather than later if cleaning the blades doesn't resolve the noise.

Can a cooker hood be repaired or does it always need replacing?

Most cooker hood faults are repairable, particularly in units under ten years old from well-known brands like Bosch, Hotpoint, Samsung, or Beko where parts are readily available. Motors, fan blades, control boards, and switches can all be replaced. The key question is whether the cost of repair is proportionate to the value of the unit and its remaining service life. If repair costs exceed 50 percent of a comparable new hood, replacement is typically the better decision.

What does it mean if my cooker hood smells of burning?

A burning smell from the hood itself - rather than from whatever is on the hob - should be taken seriously. It usually means the motor is overheating, which commonly happens when filters are heavily blocked and forcing the motor to work against resistance. It can also point to an electrical fault in the wiring or control board. Switch the hood off immediately and don't use it until an engineer has inspected it. Continuing to run an overheating motor risks a more serious failure and, in extreme cases, a fire hazard.