Cooker Hood Not Working in Leyland - Common Faults and How to Fix Them

Published August 2026 | Cooker Hood Repair

What Causes a Cooker Hood to Stop Working

Cooker hoods fail for a handful of well-established reasons, and most of them come down to either a lack of maintenance or a component that's reached the end of its life. Understanding what's actually going on inside the unit helps you decide whether to reach for a screwdriver or pick up the phone.

The most reported fault our engineers see across Leyland and the wider Lancashire area is weak or zero airflow. The cause is almost always blocked grease filters, a clogged carbon filter (on recirculating models), or ducting that's been partially or completely obstructed. Grease builds up over months of cooking and eventually chokes the airflow to the point where the fan can't draw anything through.

Beyond blockages, the main culprits are:

• Failed fan motor - The motor burns out over time, particularly if the hood has been running with blocked filters (forcing the motor to work harder). You'll often hear a humming sound when the hood is switched on but the fan doesn't turn. That hum points to a motor with shorted internal windings that can no longer run under load.
• Faulty control switch or PCB - Electronic controls on modern hoods from brands like Bosch, Smeg, and Elica can fail. The hood appears completely dead, or specific speed settings stop responding.
• Blown internal fuse or capacitor - Many hood motors use a start capacitor. When this fails, the motor either won't start at all or struggles to reach the correct speed. A failed capacitor is a cheap fix if you can source the right part.
• Lighting failure - LED or halogen bulbs inside the canopy burn out. This is a common call-out that's straightforward for homeowners to resolve themselves.
• Duct blockage or backdraft shutter stuck shut - The external duct flap, which prevents cold air coming back in when the hood isn't running, can seize or get blocked by debris. On homes in Leyland that have older installations, this shutter is sometimes the only thing stopping the hood from working.

Condensation and grease dripping from the hood are also regularly reported. This usually means the filters are saturated or the duct is running at the wrong angle and pooling moisture rather than venting it cleanly outside.

How to Diagnose the Fault Yourself

Before calling anyone out, work through these checks in order. You'll often be able to confirm the fault and potentially fix it without any tools at all.

1. Check the power supply first. Turn the hood off, check your fuse box for a tripped circuit breaker, and confirm the plug or hardwired connection hasn't been disturbed. It sounds obvious, but a tripped RCD is behind more "broken" appliances than people expect.
2. Test all speed settings and the light separately. If the light works but the fan doesn't, or one speed works and another doesn't, you've narrowed the fault to a control switch or speed selector rather than a total power failure.
3. Remove and inspect the grease filters. Most metal mesh filters slide or clip out easily. Hold them up to the light - if you can't see through them, they need cleaning. Wash them in hot soapy water or put them through the dishwasher. Let them dry completely before refitting.
4. Check carbon filters if you have a recirculating model. On hoods that don't duct to the outside (common in flats and in some Leyland properties where external ducting wasn't installed), carbon filters need replacing every 3-6 months. They can't be washed - they have to be replaced.
5. Listen carefully when the hood is switched on. A complete silence suggests a power or control fault. A humming noise with no fan movement points to a seized motor or failed capacitor. A rattling sound usually means something has got into the fan housing or a mounting has come loose.
6. Check the external vent outlet. Go outside and look at where the ducting exits the building. The external grille should be clear of debris and the backdraft flap should open when the fan runs. If it's blocked or the flap is stuck, this alone can cause the hood to appear ineffective.
7. Use the Voltrade GoFIX diagnostic tool. If you're unsure what you're looking at, GoFIX walks you through a fault-finding process step by step and helps you work out whether you're dealing with something you can fix or whether it's time to book an engineer.

DIY Fixes Versus When to Call an Engineer

There's a clear line between what a competent homeowner can do safely and what needs a trained appliance repair engineer. Getting this wrong can cause more damage or create a safety risk, so it's worth being honest about where that line sits.

Jobs you can do yourself

Cleaning or replacing grease filters is entirely a DIY job - no tools, no risk, and it resolves weak airflow more often than any other single fix. Replacing carbon filters on recirculating models is equally simple. Swapping a failed light bulb (once the hood has been off and cooled down) is also well within most people's abilities. Clearing an obviously blocked external vent grille is another job that needs no specialist knowledge.

Jobs that need a qualified engineer

Anything involving the electrical components of the hood - the motor, capacitor, PCB, wiring, or integral switches - should be handled by a qualified appliance repair engineer. In Leyland and across Lancashire, our engineers carry common capacitors, switch assemblies, and motor units for the most popular brands including Hotpoint, Beko, Bosch, and Zanussi. Working inside a mains-connected appliance without the proper knowledge creates real risk of electric shock or fire.

If your hood is hardwired rather than plugged in (common in built-in installations), the electrical supply should only be isolated and worked on by someone with the appropriate competence. Don't assume that switching the appliance off at the wall is enough - on hardwired installations there may be no isolator switch at all.

Motor replacement, PCB replacement, and any work involving the ducting that runs through walls or ceilings also falls firmly into the professional category.

What a Qualified Appliance Engineer Will Do

When one of our engineers attends a cooker hood fault in Leyland, the process follows a logical sequence that goes well beyond what most homeowners can check themselves.

The engineer will start by confirming the fault description, then carry out a full visual inspection of the hood, filters, ducting access points, and control panel. They'll test voltage at the motor and measure the capacitance on any start capacitor using a multimeter. A faulty capacitor often reads zero or well outside its rated value - it's a quick check that gives a definitive answer.

If the motor has failed, the engineer will assess whether a replacement motor is available for the hood's make and model, and whether the cost of the part makes repair economical. For older hoods or budget brands, it's sometimes better value to replace the unit. For higher-end hoods - a Smeg, a Siemens, or a well-specified Elica - repair almost always makes financial sense.

The engineer will also check the full duct run where accessible, inspect the external termination point, and test airflow before and after any repair to confirm the problem has been fully resolved. If the ducting has a significant grease build-up, they'll advise on specialist duct cleaning, which is a separate job but important for both performance and fire safety.

A quality repair job on a cooker hood in Leyland typically takes between one and two hours depending on the fault and the ease of access to the unit.

Costs and What Affects the Price

Cooker hood repair costs in the UK vary depending on the fault, the age of the appliance, and the parts required. Here's a realistic breakdown of what to expect in 2026.

Call-out and diagnostic fee: Most appliance engineers charge between 60 and 90 pounds for the call-out, which typically covers the first 30-45 minutes of labour and the diagnosis. This fee is usually applied against any repair work carried out.

Filter replacement: Metal mesh filters cost between 10 and 30 pounds for most standard sizes. Carbon filter cartridges are typically 10-25 pounds. If you're buying replacements yourself, check the model number on your hood and order from the manufacturer or a reputable parts supplier.

Capacitor replacement: Parts cost 5-15 pounds. With labour, expect to pay between 70 and 110 pounds all in.

Motor replacement: Motor units for common brands like Hotpoint, Beko, and Bosch typically cost between 40 and 120 pounds for the part. With labour, a motor swap typically comes out between 130 and 220 pounds.

PCB or control module replacement: This is the most expensive repair on the list. PCBs for mid-range and premium hoods can cost 80-200 pounds for the part alone. Total repair cost is commonly between 160 and 350 pounds. On an older or budget hood, replacement of the whole unit may be more economical.

Full unit replacement: A decent replacement cooker hood suitable for most Leyland kitchens costs between 100 and 400 pounds for the unit itself, with installation labour on top. For a like-for-like swap with no new ducting required, installation typically takes 1-2 hours.

Factors that push costs up include difficult access (integrated hoods in tall housings, for example), the need to re-route ducting, or hoods from premium European brands where parts have longer lead times or higher prices.

How to Prevent Cooker Hood Problems in Future

The vast majority of cooker hood faults in Leyland homes that our engineers attend are the direct result of filters that haven't been cleaned regularly enough. A simple maintenance routine will keep most hoods running properly for 10-15 years without any significant repair.

• Clean metal grease filters monthly if you cook frequently. Dishwasher-safe filters can go straight in. Hand wash others in hot water with a degreasing washing-up liquid.
• Replace carbon filters every 3-6 months on recirculating models. Most manufacturers recommend 3 months for heavy cookers and 6 months for occasional use.
• Run the hood at a lower speed for longer rather than at maximum speed for short bursts. High speed puts more strain on the motor and bearings over time.
• Switch the hood on before you start cooking, not after. Getting the airflow established before steam and grease are generated reduces the amount of grease that settles on the filters and fan blades.
• Leave the hood running for 5-10 minutes after you finish cooking to clear residual steam and odours.
• Have the ducting checked every few years. In Lancashire properties with older duct installations, accumulated grease can eventually create a fire risk as well as a ventilation problem.
• Keep the fan housing clean. Once a year, with the hood isolated from power, wipe down the fan blades and housing with a degreasing cleaner. This is something an engineer can do as part of a service visit if you'd rather not do it yourself.

Frequently Asked Questions

Why is my cooker hood running but not extracting any smoke or steam?

This almost always means the filters are blocked or the external duct is obstructed. Even if the fan is spinning, it can't move air if there's nowhere for it to go. Start by removing and cleaning the grease filters. Then check the external vent outlet to make sure the backdraft shutter is opening freely. If those checks don't resolve it, the issue is likely inside the ducting run itself or with a reduced-capacity fan motor.

My cooker hood makes a humming noise but the fan doesn't turn - what does that mean?

A humming noise with no fan movement is a classic sign of a failed start capacitor or a seized motor. The electrical supply is reaching the motor, but the motor can't generate enough torque to start turning. A start capacitor is a relatively inexpensive part and a common repair. If the motor itself has seized, it will need replacing. Either way, this is a job for a qualified appliance engineer rather than a DIY fix.

How long should a cooker hood last and is it worth repairing an old one?

A well-maintained cooker hood should last 10-15 years. Whether it's worth repairing depends on the age, the cost of the repair, and the quality of the original unit. A 3-year-old Bosch or Siemens hood with a failed capacitor is almost always worth repairing. A 12-year-old budget hood that needs a new motor probably isn't. As a general rule, if the repair costs more than half the price of a comparable new unit, replacement starts to make more sense.

Can I replace a cooker hood in Leyland myself or do I need a professional?

If the replacement hood plugs into a standard 13-amp socket, a competent DIYer can usually manage the swap - the main challenge is supporting the weight of the unit while fixing it in position. If the hood is hardwired, the electrical connection needs to be made by a qualified electrician or appliance engineer. Any changes to the ducting route also benefit from professional input to make sure the installation meets building regulations, particularly if it involves ducting through an external wall.

Why does my cooker hood drip grease or water?

Grease dripping from the hood usually means the filters are saturated and grease is being pushed back through rather than captured. This is a maintenance issue - clean or replace the filters and clean out the grease collection tray if your model has one. Water dripping typically points to condensation in the duct, often because the duct run is too long, inadequately insulated, or doesn't have enough fall to drain. In Leyland homes where ducting runs through a cold external wall, insulating the duct can resolve this completely.