Kitchen Extractor Fan Faulty? Grease Is Usually the Culprit in Kenilworth

Kitchen extractor fans deal with an environment bathroom fans never encounter: airborne grease. Every fry-up sends microscopic oil particles into the air, and they settle inside the fan, on the impeller, across the casing and along the ducting. Over months and years that film builds up, catches dust, and eventually causes faults that look electrical but are really mechanical – and vice versa. Kitchen fan diagnosis needs to account for both.

Typical kitchen fan faults and their causes

A fan that has gradually gone quiet in terms of airflow, while still humming away, is almost certainly choked with grease and dust on the impeller – the blades simply can't grip the air. A fan that has stopped turning altogether may have a seized motor, whose bearings have been gummed by grease, or a failed control module. Noisy operation often comes from an unbalanced, grimy impeller or a loose mounting. A fan that runs but extracts nothing may have a backdraught flap glued shut by grease, or a duct lined and partially blocked with build-up. And in kitchens where a cooker hood shares the extraction, grease in the hood's filters and grease trap affects the whole route.

The fire-safety angle, stated plainly

Grease build-up in kitchen extraction isn't just inefficient – it's combustible. A heavily fouled impeller and duct carrying grease is a genuine fire load, and a motor working harder against a choked impeller runs hotter. We treat heavy grease fouling as a reason to clean properly and promptly, not as a cosmetic issue. That said, this is routine maintenance-level concern rather than an emergency – if you ever notice smoke or a burning smell from the fan, that's a stop-and-switch-off situation, covered further below.

What we check on the visit

Our engineer assesses the fan's airflow performance, examines the impeller and casing for grease and dust loading, checks the backdraught flap and duct route for build-up and blockages, and tests the switching, controls and motor where the fault points that way. We also look at the wider extraction route – cooker hood filters if relevant, and the external vent, which in kitchens commonly clogs with grease and airborne debris.

The likely fix

A professional degrease of the impeller, casing and accessible duct often restores a sluggish kitchen fan to full performance, and dramatically reduces the fire load. A glued-shut flap is freed or replaced. A seized motor or failed module is replaced – module-only where the model allows. Where the fan is old, undersized or beyond sensible repair, we'll recommend a suitable replacement rated for kitchen use, quoting the unit and fitting separately. Every option is quoted in full for your approval before work starts.

If there's smoke or a burning smell

Stop using the fan, switch it off at the isolator, and don't restart it. If you see flames or active smoke, call 999. Otherwise book a diagnosis urgently and describe the smell – a burning smell from a grease-laden fan needs prompt attention, not continued use.

Keeping it clean afterwards

Once the fan is restored, regular attention keeps it that way. Wiping the outer grille monthly with the fan off, and booking a professional degrease periodically for a busy kitchen, prevents the slow slide back to choked performance. A clean fan also extracts better, and a fan that extracts well keeps its own duct cleaner – the benefits compound.

Booking

Contact Maintenance Men with the kitchen's layout, whether a cooker hood is involved, how long the fault has been building, and the fan's make and model if visible. Same-day visits may be available. We'll diagnose, explain, and quote before starting.