An annual boiler service is the single best maintenance investment a homeowner can make. It costs from £149.99 in London. It catches sensor drift, fan wear, gas-pressure issues, flue defects and combustion inefficiencies before they become breakdowns. It validates manufacturer warranties (most boiler warranties are explicitly voided without documented annual servicing). It typically extends boiler life by 5+ years.
Our annual service follows the full manufacturer service schedule, strip-down, inspection, gas-pressure verification, flue-gas analysis (FGA), case clean, ignition system check, ionisation probe inspection, pressure-relief valve test, and condensate trap cleaning. A signed service record is issued same-day for warranty and landlord-compliance purposes.
Where this service applies
- Maintaining manufacturer warranty (Worcester, Vaillant, Ideal, Viessmann all require annual service)
- Landlord compliance (CP12 plus annual service combined from £251.99 inc VAT, saving £47.99 vs booking separately)
- Pre-winter readiness
- Carbon monoxide safety check
- Detection of imminent component failure
- Maintaining boiler efficiency (combustion fouling reduces efficiency 2–5% per year if untreated)
- Restoring full output on under-performing systems
- Validating boiler condition for property sale
How we deliver
No surprises, no upselling. The exact path every job follows.
- 1
Booking confirmed with Gas Safe ID provided
Engineer's name and Gas Safe Register ID emailed before arrival. - 2
Visual inspection & case removal
All accessible components inspected. Case cleaned. - 3
Combustion analysis (FGA)
Calibrated analyser measures CO, CO₂, O₂, flue gas temperature, combustion ratio. - 4
Gas pressure verification
Working and standing pressures measured and adjusted if needed. - 5
Component clean & inspection
Heat exchanger, fan, ignition electrodes, ionisation probe, condensate trap. - 6
Pressure relief valve test
PRV operation verified. - 7
Boiler reassembled, recommissioned
Final commissioning checks before sign-off. - 8
Service record issued
Signed Benchmark / service record for manufacturer warranty file.