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Ventilation Contractors
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Maintenance and repairs

Ventilation repairs and fault finding

Noisy, failed or leaking fans, PIV, MVHR and commercial extract put right.

  • From £95 inc VAT per visit
  • Charged visit, price agreed first
  • Airflow tested and recorded
Get a guide price0800 088 6341
Engineer on steps fitting a new extractor fan in a bathroom

Ventilation repairs fix systems that have stopped working, become noisy or leak, from a single bathroom fan to a commercial air handling unit. We find the cause, explain the options, and price the repair before we carry it out.

How it works

Common faults include worn fan bearings, failed capacitors and motors, condensate leaks, blocked filters, crushed or disconnected ducts, broken controls and humidity sensors that never switch the fan on. Sometimes repair is not worth it, and a modern replacement is cheaper to run; we will say so.

For homes, a visit covers fans, PIV and MVHR. For businesses, we repair extract fans, heat recovery units, AHUs and kitchen extract fans.

Options we fit

Home repairs

Fans, PIV units and MVHR systems.

Commercial repairs

Extract fans, heat recovery units and AHUs.

Kitchen extract fans

Fan motors, belts and controls on canopy systems.

Repair or replace advice

Honest comparison of repair cost against replacement.

Signs you need this

  • A fan that hums but does not spin
  • Grinding or rattling noises
  • Water dripping from a unit or duct
  • Error codes on an MVHR or PIV display
  • Controls or boost switches that do nothing
  • Extraction that has gradually weakened

Guide prices

Ventilation repairs and fault finding guide prices
WorkGuide price
Home repair or fault-finding visit, first hour (parts extra) (per visit)£95–£165 inc VAT
Commercial repair or breakdown visit, first hour (parts extra) (per visit)£145–£245 + VAT

Guide prices using West Midlands (our baseline) rates. Home prices include VAT at 20%; business prices exclude VAT. A guide price is not a quote: we confirm a fixed price in writing first. London is about 20% higher and the North East about 8% lower.

What happens, step by step

  1. Describe the fault

    Photos, make and model help us bring the right parts.

  2. Diagnose

    We test the fan, controls, wiring and ducts.

  3. Price

    Repair or replacement options with fixed prices.

  4. Fix

    Repair carried out on the spot where parts allow.

  5. Test

    Airflow checked after the repair.

The rules that apply

England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.

Wales

Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. We design to the Welsh rates and commission mechanical systems so the results can be recorded.

Scotland

In Scotland, ventilation is covered by the Building (Scotland) Regulations and section 3 of the Technical Handbooks, and most building work needs a building warrant first. We work to the Scottish ventilation standards and record the airflow achieved.

Northern Ireland

In Northern Ireland, ventilation is covered by the Building Regulations (Northern Ireland) and Technical Booklet K. We design to the Northern Ireland guidance and measure the airflow achieved.

Questions people ask

How much does a ventilation repair cost?

A home repair visit costs £95 to £165 including VAT for the first hour, plus parts; commercial visits are £145 to £245 excluding VAT for the first hour.

Is it worth repairing an old extractor fan?

Usually not for a basic bathroom fan, because a new fan costs little more than the repair. MVHR, PIV and commercial fans are often worth repairing.

Why is my extractor fan humming but not spinning?

A humming fan that does not spin often has a failed capacitor, seized bearing or obstruction. It should be switched off until repaired.

Why is water dripping from my ventilation?

Drips usually come from condensation in an uninsulated duct, a blocked condensate drain or a duct sloping the wrong way.

Can you repair any make?

We repair most common makes. If parts are unavailable we will tell you before the visit and suggest options.

Can you come out urgently?

We cannot promise an out-of-hours or same-week visit. We try to fit in failed kitchen extract and commercial plant first, so ask about the earliest available visit when you call.

Related services

Modern bathroom with walk-in shower and wall extractor fan

Extractor fan installation

Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested.

From £175 inc VAT per fan

Ventilation repairs and fault finding by area

Choose your area for local guide prices and the towns we cover.

Get a guide price in two minutes

Answer a few questions for a price range, or send photos and we will come back to you with a written quote.

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