Greater London · Extract fan repair and replacement
Extract Fan Repair in St Johns
Extract fan repair and replacement for commercial sites in St Johns and across Greater London. CHAS, SafeContractor and ISO 9001, and fully insured.
- A squealing belt on start-up
- A motor that trips out or overheats
- An extract fan that has stopped working
How we handle extract fan repair in St Johns
Across St Johns, we deal with fan faults of every kind, from a squeal at start-up to a fan that will not run at all. The fault is diagnosed, quoted at a fixed price and put right, or the fan is replaced if repair doesn’t make sense. The work covers bearings, belts and pulleys and fan motors, and the jobs we see most are vibration spreading from the fan into the ducts and a fan rattling in its housing.
Replacing a fan in a London building often means working at height or in a tight plant space, and in St Johns, parking and lifting are part of that. Repairs can be done out of hours so the kitchen keeps trading.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
- Place
- St Johns (SE13, SE10, SE8)
- Wider area
- Greater London
- Reporting
- Photo report after each visit
- Quotes
- A fixed price before any work starts
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What extract fan repair can’t fix
It’s worth knowing the limits before booking:
- Gas interlock faults that a Gas Safe registered engineer must deal with
- Faults in the building’s electrical supply, which need an electrician
- Smells from the discharge that need odour control equipment
If in doubt, ring 0345 646 2711 or send us an email and we’ll say what we think.
What the work covers
- Bearings
- Fan motors
- Kitchen extract fans
- Roof and wall fans
- Belts and pulleys
- Fan housings
Fixed quotes for extract fan repair in St Johns
Sites vary more than people expect. What affects the quote:
- Whether we need access equipment or extra panels
- Site rules, permits and inductions
- The condition of the system
- A single visit or a regular plan
We do not list prices on the website, because each job is priced on what it involves. For a fixed quote, ring 0345 646 2711 or use the quote form, and we will explain what it covers.
Helping us quote
There’s no need for technical detail. Just send:
- The roof, plant room or outside wall the system runs to
- The site address and the type of premises
- Your opening hours and when the area is out of use
- Any symptoms, from odd noises to smells or leaks
Every quote begins with a look at the system, either from pictures and details you send or from a site visit. After that, you get a fixed price for the work so you know the cost before we start.
How it works
There’s very little for your team to do on the day. Someone lets us in at the agreed time and shows us where everything is, and the rest is down to us. Afterwards, the area is left tidy and the written report follows. Loading bays, visitor permits and roof access are the first things we ask about for a site in St Johns.
- We agree a time to attend, out of hours if needed.
- We isolate the extract and open the fan housing.
- Bearings, drive, impeller, motor and mounts are inspected.
- You hear whether repair or replacement makes sense, with a fixed quote.
- We complete the work and check the fan runs smoothly.
How to prepare
- Plan for cooking equipment or plant to be off before we arrive
- Dig out any earlier paperwork for the system
- Mention any sign-in, permit or induction we need
How to get a quote
Here’s what helps us quote: where the site is, what it is and its opening hours, pictures of the system and any previous report or certificate. Then ring 0345 646 2711 or drop us a line.
Advice
Other services in St Johns
St Johns questions
Who do I call if an extract fan fails in St Johns?
Day or night, a failed fan in St Johns can be reported on our emergency line. Call 0345 646 2711 and tell us what the fan is doing, or not doing. Tell us where the fan is and how to reach it.
Can the work in St Johns be done at night or at weekends?
Yes, we can come after you close and finish before you open. The work in St Johns can fit around your hours. Tell us your opening hours when you ask for a quote.
What happens if you cannot reach some of it?
We record them on the report, with a note of where it is, and we tell you what would make it reachable, for example new access panels.
What should go in our maintenance log?
Visit reports, certificates and your in-house cleaning logs. Insurers, fire officers and EHOs may all ask to see them, so keep them where they can be found quickly.
Does the law say we must follow TR19?
No, not in itself. TR19® is the benchmark insurers, fire officers and EHOs check against, and many insurance policies ask for proof of TR19® cleaning. The legal duty sits in the Regulatory Reform (Fire Safety) Order 2005 in England and Wales.
Why is our extract fan so noisy?
Noise usually comes from grease build-up, bearings, belts or loose fixings. Each sounds a little different, and we diagnose it on site.
How much does an extract fan repair cost?
We can’t price it without knowing the fault. Once we’ve looked at it, you get a fixed quote for the repair or the replacement.
Is it worth cleaning the extract while you are fixing the fan?
Repairing the fan doesn’t clean the canopy or ducts. Grease on the fan normally means grease in the ducts, and we can arrange both.
Why it’s worth doing now in St Johns
An overloaded motor is under constant strain. Every hour of strain takes its toll, and when it finally fails, it may take other parts with it. Catching it early keeps the repair small. London buildings are shared, so a fire or failure in one system can reach the neighbours above and beside you.
One small site or a whole estate, the quote is built the same way: the work involved, the access and the timing. You’ll have a fixed price before we start.
Why St Johns businesses choose us
- Ventilation hygiene specialists since 2009
- A fixed price before any work starts
- Work around your opening hours, with 24/7 emergency cover
- A single point of contact for sites across the South East and London
Read how cleaning jobs are priced and how to check a contractor.
What the work involves, part by part
Fan controls
We check the controls as part of every diagnosis, because a fan that won’t start is not always a failed motor.
Belt-driven fans
Squealing at start-up often points to a belt. Belts are checked for wear, tension and alignment and replaced if they’re worn.
What extract fan repair looks like in St Johns
There are about 452 cafés, restaurants and staff canteens and about 224 takeaways in St Johns and the streets around it, up to about 1.5 miles out, according to the Food Standards Agency’s register. Every one of them that cooks under a canopy depends on its extract fan to keep cooking. In St Johns, food businesses are inspected by environmental health officers from Greenwich council. Food hygiene rules expect food premises to have suitable and sufficient ventilation. That is one more reason not to keep cooking with a broken fan. Lifting a replacement fan onto a London roof can need a loading slot and the building’s agreement.
If you run a school kitchen, at a school such as Ashmead Primary School or nearby, a fan that’s getting noisy is best repaired in the holidays before it fails in term. If you run a kitchen close to St Johns station and the extract fan is getting noisy, a planned repair after closing beats a breakdown at the rush.
St Johns is about 4 miles south-east of London, in Greater London. Whatever kind of site you run in St Johns, extract fan repair is something we can help with. Visits can be booked for evenings, overnight or weekends so trading is not interrupted. St Johns is one of 764 places in Greater London we cover for extract fan repair.
Extract fan repair in SE13, SE10 and SE8 follows the same survey, fixed quote and written report as everywhere else we cover. If you need extract fan repair at premises on Avon Road, Mill Lane and Clare Road or anywhere close by, we can help. St Johns is on the A2210 and A2211, which makes it straightforward for our technicians to reach for out-of-hours visits. If your site is just outside St Johns, we cover New Cross (1 mile west), Deptford (1 mile north), Lewisham (1 mile south-east), Telegraph Hill (1 mile west) and Ladywell (1 mile south). Within a short drive, we also cover London (4 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (8 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
What’s near St Johns
Locally, jobs take us to businesses close to Wickham Arms, Brookmill Park and Addey and Stanhope School. Also close by are St. Paul's (0.7 miles north) and Laban Centre (0.8 miles north). St Johns has its own railway station: St Johns station. Nearby you will also find Fan Museum (0.9 miles north-east) and Lewisham Shopping Centre (0.7 miles south-east). Open spaces near St Johns include Brookmill Road Local Nature Reserve and Tower Hill.
When to call us in St Johns
When filters clog and ducts fill with grease, the fan has to strain. A motor that strains runs hot, trips out or eventually burns out.
Clients usually contact us after spotting one of these:
- A fan running too slowly to clear the kitchen
- A fan shaking on its mountings
- A fan that won’t start at all
- An overheating extract motor
Occasional-use kitchens, such as a hall kitchen near Church of St John or elsewhere in St Johns, are where a stiff or seized fan can turn up.
What your quote should include
- Whether the quote shows VAT
- Whether inaccessible sections are listed on the report
- What paperwork you get at the end
- If they look at the system before pricing
Landlords, agents and facilities managers
Managing agents often deal with us directly. Send the address, what’s needed and how access works and we’ll come back with a fixed quote.
Records are where multi-site compliance often slips. Every visit ends with a dated report and pictures, so you can show an insurer or inspector what was done at each site.