Cooker Hood Not Working Common Faults Barnstaple Homeowners Ask About

Published October 2026 | Cooker Hood Not Working Common Faults

We asked our Appliance Repair engineers the questions Barnstaple homeowners ask most about cooker hoods that have stopped working, are making strange noises, or simply aren't doing their job over the hob.

Why Has My Cooker Hood Completely Stopped Working?

A cooker hood that won't switch on at all is typically an electrical issue rather than a mechanical one. The first thing our engineers check is whether the unit is actually getting power. It sounds obvious, but a significant number of call-outs turn out to be a tripped circuit breaker or a blown fuse in the plug or fused spur - not a fault with the hood itself. Always check your consumer unit first before assuming the worst.

If power isn't the issue, the next likely culprit is the control panel or PCB (printed circuit board). On modern touch-control hoods from brands like Bosch or Hotpoint, the control electronics can fail - sometimes due to moisture, grease ingress, or a component burnout. If the fan and lights are both completely dead with power confirmed, that points towards the control board rather than the motor itself.

Older hoods with rotary or push-button controls can also have worn-out switches. These components degrade over time, particularly on hoods that are used heavily every day. Our engineers use the Voltrade GoFIX diagnostic tool to pinpoint where the fault sits before opening anything up, which saves time and means we only replace what's actually broken rather than guessing.

Don't assume a completely dead hood needs replacing outright. In many cases, a control board or switch repair is all it takes to bring the unit back to life at a fraction of the cost of a new installation.

Why Isn't My Cooker Hood Extracting Smells and Smoke Properly?

Poor extraction is one of the most common complaints we hear from Barnstaple homeowners, and the cause is almost always blocked or saturated filters. A cooker hood works by drawing air through a grease filter, then either expelling it outside through a duct (ducted installation) or passing it through a charcoal filter before recirculating it back into the kitchen.

Grease filters should be cleaned every four to six weeks if you cook regularly. When they're clogged, the fan works much harder and airflow drops noticeably. Most metal mesh filters can be soaked in hot soapy water or put through the dishwasher. Appliance specialists confirm that blocked filters are among the leading causes of poor extraction performance and are the first thing any engineer will inspect on a job like this.

On recirculating hoods, charcoal filters are the other common culprit. These aren't washable - they need replacing entirely, typically every three to six months depending on how heavily the kitchen is used. If you have a recirculating LG or Beko hood that's suddenly letting cooking smells linger, a fresh charcoal filter often resolves the problem completely.

If your filters are clean and the hood is ducted, it's worth checking whether the external duct or wall grille is partially blocked. In Devon properties with external vent covers, birds occasionally nest in or around the grille, and even a partial blockage can dramatically reduce extraction efficiency.

Why Is My Cooker Hood Making a Loud or Strange Noise?

Noise problems fall into a few distinct categories, and the type of noise tells you a lot about what's causing it.

A rattling or vibrating sound is usually caused by a loose filter or panel that isn't seated correctly in its housing. Before calling anyone out, check that your grease filters are properly clipped in and that any decorative panels are secure. This is a very common fault on cheaper hoods and it costs nothing to fix yourself.

A grinding or scraping noise suggests the fan motor bearings are wearing out. Fan motors are subject to heat, grease, and continuous use, and the bearings do degrade over time. Left alone, worn bearings will eventually cause the motor to seize completely, turning a minor repair into a more significant one.

A high-pitched whining noise that gets louder at higher speeds can also indicate bearing wear, but on some Samsung and Bosch models it's caused by the fan blade becoming unbalanced - often because grease has built up unevenly on the blades over time. As appliance repair guides note, unbalanced fan blades are a common source of vibration and noise in cooker hoods, and it's typically fixable without replacing the whole motor assembly.

If the noise is new and the hood is still under warranty, contact the manufacturer first. If it's out of warranty and the motor needs attention, that's a job for a professional with the right tools to assess whether it's the bearings, the blade, or something else.

Why Has the Light on My Cooker Hood Stopped Working?

Cooker hood lights fail for a few different reasons. The most common is simply a blown bulb, which is a quick fix - but you need to use the correct replacement type. Many modern hoods use G4 halogen capsules or GU10 LED bulbs, and fitting the wrong type can cause premature failure or, in some cases, damage the fitting itself. Always check the manual or the rating plate before buying a replacement.

If you've replaced the bulb and the light still doesn't work, the fault is likely in the light switch itself or the wiring to the light fitting. On touch-panel hoods, the light control circuit can fail independently of the fan controls, which means the fan still runs normally but the light stays dark.

On some Hotpoint and Bosch hoods, there's a thermal cut-out near the light fitting that trips if the area overheats. This is a safety feature that resets once the hood cools down. If your light cuts out after extended cooking sessions and then comes back on an hour or so later, this thermal protection is likely triggering rather than there being a wiring fault.

LED conversion kits are worth considering if your hood still uses halogen bulbs. LEDs run significantly cooler, last much longer, and draw less power. Our engineers in Barnstaple often recommend this upgrade during a service visit, as it reduces the likelihood of future light failures and takes thermal stress away from the fitting.

Why Does My Cooker Hood Keep Cutting Out or Switching Off by Itself?

Intermittent shutdowns are frustrating to diagnose because they don't always happen on demand, but they usually point to one of a small number of causes. The most common is a thermal overload protector triggering. Most cooker hood motors have a built-in thermal cut-off that shuts the unit down if it runs too hot - this is a deliberate safety mechanism to prevent motor burnout, not a defect in itself.

The reason the motor overheats is typically one of two things: blocked filters forcing it to work harder than it should, or a motor that's already starting to fail and drawing more current than normal as a result. Cleaning the filters thoroughly and then monitoring the hood is always the first step. If the cut-outs stop, you've identified the problem. If they continue with clean filters, the motor needs closer attention.

On touch-controlled hoods, intermittent behaviour can also stem from a faulty control board. Moisture and grease can penetrate the electronics over years of use, causing erratic operation - unexpected speed changes, flickering lights, or buttons that stop responding.

If you're in Barnstaple and experiencing this kind of intermittent fault, it's worth running a GoFIX diagnostic through the Voltrade platform before booking an engineer. The fault pattern it identifies helps the engineer come prepared with the right parts, which means a faster fix and fewer return visits.

How Do I Know If the Motor in My Cooker Hood Has Actually Failed?

Motor failure is the most serious mechanical fault a cooker hood can develop, and there are some fairly clear signs to look for. A completely dead motor means the fan won't run at all even though the hood has power - you might see the lights come on and hear a click when you press the speed button, but there's no airflow whatsoever.

A motor that hums but doesn't spin is a common symptom that many people assume means a dead motor, but it often points to a failed start capacitor instead. The capacitor is a small component that gives the motor the initial electrical kick it needs to begin spinning. On many single-phase fan motors, a failed capacitor produces exactly this symptom - the motor is trying to run but can't get started. Replacing a capacitor costs far less than replacing the whole motor, so it's always worth having this checked before assuming the motor itself is beyond repair.

A motor that runs but only at one speed (usually slow) despite the controls being set to high typically indicates a winding fault inside the motor. This is harder to repair and usually means a motor replacement is the most practical route forward.

Cooker hood motors for brands like Bosch and Samsung are generally available as spare parts through UK suppliers. Our engineers serving Barnstaple and the wider Devon area carry common motors and capacitors, which means many motor-related repairs can be completed on the first visit without a return trip.

Can I Repair a Cooker Hood Myself, or Do I Need a Professional?

Some cooker hood maintenance is absolutely within reach for a competent DIYer. Cleaning filters, replacing bulbs with the correct compatible type, and checking that the circuit breaker hasn't tripped - these are all reasonable tasks to handle yourself without any specialist knowledge.

Where things get more involved is internal electrical work. Replacing a motor, control board, or internal wiring requires the hood to be fully isolated from the mains supply and carefully disassembled. If you're confident working with appliances and the hood is connected via a standard plug and socket, you may be able to manage a component swap yourself if you can source the correct part. Always confirm the appliance is fully isolated from the power before opening it up.

Hardwired cooker hoods are a different matter. These are connected directly into your home's fixed wiring rather than via a plug, and any work involving the fixed wiring connection itself should be carried out by a qualified electrician. Our engineers are trained to work on the appliance side of these installations safely.

As a general rule, if you've tried the obvious checks and can't identify the fault, calling a professional is the right call. Misdiagnosis leads to replacing expensive parts unnecessarily, and a qualified engineer with the right diagnostic tools will typically save you money compared to trial-and-error parts swapping at home.

How Often Should I Clean and Maintain My Cooker Hood to Keep It Running Well?

Regular maintenance is the single most effective thing you can do to extend the working life of a cooker hood and prevent avoidable breakdowns. Here's what our engineers recommend based on typical household use:

For metal mesh grease filters, aim to clean them every four to six weeks if you cook daily, or every two to three months for lighter use. Most are dishwasher safe, though check your manual first - some Beko and older Hotpoint models have filters that can discolour or warp in a high-temperature dishwasher cycle, so a hot hand-wash is safer for those.

For charcoal filters on recirculating hoods, replacement every three to six months is the standard guidance. These filters cannot be washed or regenerated - once they're saturated, they need to come out and be swapped for the correct replacement filter for your specific model.

The exterior of the hood and the fan blades themselves should be wiped down periodically. Grease that accumulates on fan blades causes imbalance over time, which leads to the kind of vibration noise that becomes more noticeable at higher speeds. You don't need to disassemble the hood to clean accessible blade surfaces - a good kitchen degreaser and careful work through the filter aperture deals with most of the build-up.

If your hood is ducted, a yearly check of the ductwork is worthwhile. Flexible ducting can sag and trap grease over time, which reduces airflow and creates a potential fire risk if left unchecked for several years.

When Is It Worth Repairing a Cooker Hood Rather Than Replacing It?

This is one of the most common questions our engineers field, and the answer depends on the age of the hood, the cost of the specific repair, and the price of a comparable replacement.

As a working guide, if the repair cost comes in at less than 50 percent of the cost of a comparable new hood, repair typically makes sense - especially if the unit is less than six or seven years old. A new motor or control board on a mid-range hood might cost between 80 and 180 pounds fitted, while a comparable replacement hood could cost 150 to 400 pounds or more before you factor in installation.

Where repair becomes harder to justify is on budget hoods that cost less than 100 pounds to buy new, or on very old units where other components may be approaching the end of their life even after the presenting fault is fixed. If an engineer finds multiple developing faults on a single visit, that's usually a sign the hood is reaching the end of its practical service life and a replacement makes more economic sense.

For higher-spec chimney-style extractors from Bosch or similar brands that originally cost 300 pounds or more, repair nearly always makes financial sense unless the fault is catastrophic. Our Barnstaple engineers will always give you a clear-eyed assessment of whether repair or replacement is the better option before any work begins - there's no benefit to either party in replacing a part that won't resolve the underlying issue.

How Much Does Cooker Hood Repair Typically Cost in Barnstaple?

Repair costs vary depending on the nature of the fault, the parts required, and the accessibility of the installation. Here's a realistic guide to what you'd typically expect to pay in the Barnstaple area.

A diagnostic call-out with a minor repair such as a filter replacement or bulb fix typically costs between 50 and 80 pounds. A fan motor replacement typically falls between 100 and 200 pounds including parts and labour, depending on the motor specification and the brand. A control board replacement tends to sit in a similar range - between 90 and 180 pounds - though control boards for some European-branded hoods can be more expensive if they need to be ordered from overseas suppliers with longer lead times.

Parts availability varies considerably by brand. Common brands like Hotpoint, Beko, and Bosch generally have good spare parts availability through UK stockists, which keeps both costs and wait times down. Lesser-known brands can have longer lead times and higher parts costs, which is worth factoring in when you're weighing up repair against replacement.

Labour rates in Devon for appliance repair typically run between 50 and 80 pounds per hour, with most cooker hood repairs taking between 30 minutes and two hours on site. Most engineers will provide a fixed quote once they've diagnosed the fault, so you know what you're committing to before any work starts.

Whether you're dealing with a noisy extractor, a dead motor, a light that won't come on, or a hood that simply isn't pulling its weight, the majority of cooker hood faults are repairable at a cost well below that of a full replacement. Getting a proper diagnosis is always the first step - and in most cases it'll point you directly to the fix.

How do I know if my cooker hood needs a new motor or just a new capacitor?

If your hood hums when switched on but the fan doesn't spin, a failed start capacitor is often the cause rather than the motor itself. A qualified engineer can test the capacitor quickly with a multimeter and replace it at a much lower cost than a full motor swap, so always get a proper diagnosis before assuming the motor is beyond saving. Many homeowners spend unnecessarily on full motor replacements when a capacitor fix would have done the job.

Are charcoal filters for recirculating hoods universal, or do I need a specific one for my model?

Charcoal filters are not universal and you need to match the filter precisely to your hood model. Using the wrong size or type reduces extraction performance and can allow smells to pass through. Check your hood's manual or use the model number on the rating plate to identify the correct part number. The manufacturer's website or a reputable appliance parts supplier will have the right filter listed by model.

My cooker hood fan runs but there is no suction at all - what is likely causing this?

A fan running without any meaningful suction almost always means a blocked or disconnected duct on a ducted hood, or completely saturated filters on a recirculating model. Clean or replace the filters first. If the hood is ducted and the filters are fine, inspect the ductwork for a disconnected joint, a kinked or crushed flexible duct run, or a blocked external grille. Duct blockages are considerably more common than most homeowners realise and are an easy fix once identified.

Is it worth having a cooker hood serviced as a preventive measure even if it seems to be working fine?

A preventive service every couple of years makes good financial sense for higher-value hoods used heavily in a busy kitchen. A service typically includes a thorough filter clean, inspection of the motor and fan assembly, and a check of the electrical connections for signs of wear or loose contacts. Identifying early bearing wear or a developing capacitor fault before it becomes a full breakdown is far less costly than an emergency repair call-out in Barnstaple or elsewhere in Devon - and it keeps your extraction performing at its best between visits.