Neglected Extractor Fans Are a Fire Risk. Here's What Compliance Inspectors and Insurers Look For
A dirty or failing extractor fan isn't a cosmetic problem. It's a fire hazard, and in a commercial kitchen, it can also be a compliance failure.
Extractor fans pull heat, grease-laden vapour, and moisture out of your building. When they're neglected, they stop doing that job safely. Grease builds up inside ducts and housings, motors overheat, and electrical components wear out. That combination is exactly what fire investigators find after a kitchen or plant-room fire.
If you manage a restaurant, takeaway, commercial kitchen, workshop, care home, or any property with mechanical ventilation, this applies to you.
Why Extractor Fan Maintenance Is a Fire Safety Compliance Issue
Fire safety compliance isn't only about alarms and exits. It also covers the systems that can start or spread a fire. Extractor systems are on that list because:
Grease is fuel. Built-up grease in ducting and fan housings can ignite and carry fire through a building via the ductwork.
Motors and wiring generate heat. A struggling fan motor or damaged electrical component is a potential ignition source.
Poor airflow means trapped heat. Reduced extraction lets heat and vapour accumulate where they shouldn't.
Records matter. Insurers and fire risk assessors often expect evidence that ventilation and extraction systems are inspected and maintained by competent people. Missing records can lead to failed assessments, enforcement action, or disputed insurance claims.
A fan that "still runs" isn't necessarily a fan that's safe or compliant.
Common Problems We See
Any of these can point to a developing hazard:
Visible grease or oily residue around the fan, grille, or ceiling area
Unusual noises such as rattling, grinding, squealing, or banging
Weak extraction, with steam, smoke, or cooking smells lingering
A burning or hot-electrical smell when the fan runs
Fan cutting in and out, tripping, or failing to start
Excessive vibration from the unit or ductwork
Discoloured, warm, or scorched casings, grilles, or fittings
Condensation or moisture near electrical components
Damaged or exposed wiring, or cracked switches and controls
No maintenance records, no service history, or no idea when the system was last inspected
Past "quick fixes" by someone unqualified, leaving questions about the system's condition
⚠️ Safety Warning: Electrical Hazards
Extractor fans are connected to live electrical supplies. Do not interfere with them.
Do not remove covers, panels, or housings. Live components can cause fatal electric shock and can start fires.
Do not attempt repairs or modifications, or "temporary fixes" to wiring, controls, or isolators.
Do not use water, sprays, or cleaning products near the unit, controls, or wiring. Moisture and electricity are a deadly combination.
Do not ignore burning smells, sparking, scorching, or tripping. These are warning signs of an electrical fault, not nuisances.
Do not keep running a fan you suspect is faulty.
Ventilation and extraction systems should only be inspected, cleaned, repaired, and tested by suitably qualified, competent professionals. This is not a job for staff, maintenance generalists, or "someone who knows a bit about electrics."
If you see flames or smoke, evacuate and call your local emergency number immediately. Don't attempt to fight a fire in or around ductwork or electrical equipment yourself.
Warning Signs That Need Professional Attention Now
Contact a qualified professional urgently if you notice:
A burning or electrical smell from the fan or ducting
Smoke, sparking, or scorch marks
A fan that repeatedly trips the power or won't operate
Heavy grease accumulation you can see
Overheated or discoloured fan casings
A fire risk assessment, insurer, or inspector flagging your extraction system
Waiting for the next scheduled service isn't a safe option when a hazard is already visible.
What Professional Inspection and Maintenance Provides
A competent service doesn't just make things look clean. It gives you:
A proper assessment of the fan, ducting, and associated electrical components
Safe, specialist cleaning and servicing, carried out with the right equipment and procedures
Identification of faults before they become emergencies
Documented evidence of inspection and maintenance for your fire risk assessment, insurer, and compliance records
Clear recommendations on repairs, replacements, and service frequency
Emergency Enquiry: Don't Wait for It to Get Worse
If your extractor fan is showing warning signs, act now.
If there is active fire, smoke, or immediate danger, evacuate and call emergency services first. For everything else, including burning smells, tripping, visible grease buildup, or an inspection deadline, contact us straight away.