Gas Boiler Service in London

Silver Saints offer Boiler Servicing in London.

4.9 stars from over 1,000 reviews | Fixed price, no call-out fee | Gas Safe registered | Same or next day available | Mon to Sat 8am to 5pm | Book Online 24/7

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Specific arrival times. A one-hour arrival window is confirmed on every booking.

How much is a gas boiler service in London?

A full annual gas boiler service from Silver Saints is a fixed price of £100 plus VAT, with no call-out fee, carried out by a Gas Safe registered engineer, and Saturday is charged at the same weekday rate. A service takes around 30 to 60 minutes for a modern condensing combi and longer for an older open-flued or back boiler that needs more careful flue and ventilation checks. The fixed price covers the full inspection, cleaning, flue gas analysis, gas-tightness test and written report. If the engineer finds a pre-existing fault, that is a repair rather than a service and is charged separately at £98 plus VAT per hour, with any cost explained and agreed before the work is done.

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Why Silver Saints

Here is why over 1,000 London customers have booked Silver Saints for gas boiler servicing.

• 4.9 stars from over 1,000 Google reviews
• 5 stars on Trustpilot and Checkatrade
• Gas Safe registered engineers
• £5 million public liability insurance
• Operating since May 2008
• All work guaranteed against faulty workmanship, with a 12-month guarantee on labour and parts
• A specific one-hour arrival window on every booking

Ready to book? We can come today or tomorrow.

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What is included in a Silver Saints boiler service?

A Silver Saints boiler service is a full Gas Safe inspection, not a quick look and a sticker, and the engineer works through a set sequence on every visit. It starts with a visual check that the boiler, its installation and its position comply with current building, electrical, gas-safety and water regulations and the manufacturer's instructions. A pre-service check follows: the engineer fires the boiler, checks its basic operation, looks for initial faults and takes a gas rate reading. The casing then comes off, which a householder should never do themselves, so the main components can be examined and cleaned: the main burner, the main injector, the heat exchanger, the condense trap, the spark and sensing probe, and the seals and fans. The electrics are checked for overheating, all internal surfaces are cleaned, the water and gas pipework and joints are inspected, and the flue terminal is confirmed clear and unobstructed. A flue gas analyser then confirms the boiler is combusting correctly and the readings are recorded, a gas-tightness test checks the system for leaks, and the casing is refitted before a written service report is produced for you to check and sign off.

Boiler servicing across different London properties

The boiler is only half the job, the property around it is the other half, and that varies sharply across London. Modern new-build flats, common in Canary Wharf and the regeneration zones, usually have a sealed condensing combi that is quick and standardised to service. Victorian and Edwardian houses often have an older system boiler with a separate cylinder, or an open-flued boiler that needs the flue integrity and the room ventilation checked more carefully, which takes longer. Period conversions sometimes still have a back boiler or a boiler boxed into an awkward cupboard or a kitchen run, where access is tight. London's hard water also furs up heat exchangers and leaves sludge in the system faster than in soft-water areas, so an annual service that catches scaling and poor circulation early is what stops a £100 service becoming a £600 winter breakdown.

Does a boiler service keep my warranty valid?

Yes, an annual gas boiler service is what keeps most manufacturer warranties valid: Worcester Bosch, Vaillant, Baxi, Ideal and the other major brands all require a documented annual service to honour their extended guarantees, and a missed year can void the cover. A Silver Saints service is carried out by a Gas Safe registered engineer and produces a dated written service report you can keep as proof for the manufacturer, the same record a warranty claim or a house sale will ask for.

Is a boiler service the same as a Gas Safety Certificate?

No, a boiler service and a Landlord Gas Safety Record (CP12) are different things, and landlords often need both. A service is a maintenance check that cleans and tests the boiler to keep it running safely and efficiently and to protect the warranty. A Landlord Gas Safety Record is the annual legal safety check a landlord must have on every gas appliance, with the record given to tenants within 28 days or before a new tenant moves in. Silver Saints can carry out either, or both on the same visit, since the engineer is on site and Gas Safe registered.

Combine your boiler service with other work in one visit

Because every Silver Saints engineer is multi-trade and Gas Safe registered, a boiler service can be combined with other work in the same visit with no second call-out fee. Customers commonly pair a service with a Landlord Gas Safety Record, a radiator bleed or balance, fixing a dripping or seized radiator valve, or sorting low system pressure, all booked under one appointment rather than waiting on separate trades.

Frequently asked questions about gas boiler servicing in London

Can you service my boiler this week in London?

Silver Saints offers same-day and next-day boiler service appointments across London subject to availability, so call 0207 0999 199 or book online at bookings.silversaints.com and the team will confirm the earliest Gas Safe engineer slot for your postcode.

How much does a gas boiler service cost in London?

A full annual gas boiler service from Silver Saints is a fixed price of £100 plus VAT with no call-out fee, and a separate boiler repair, if a pre-existing fault is found, is charged at £98 plus VAT per hour.

What is included in a gas boiler service?

A Silver Saints gas boiler service includes a visual compliance check, a pre-service fire-up and gas rate reading, removal of the casing to examine and clean the burner, injector, heat exchanger, condense trap, probe, seals and fans, a flue gas analysis, a gas-tightness test and a written service report.

How long does a boiler service take?

A boiler service takes around 30 to 60 minutes for a modern condensing combi boiler, and longer for an older open-flued or back boiler where the flue and ventilation need more careful checking.

Do I need to service my boiler every year?

An annual gas boiler service is recommended for safety and efficiency and is required by most manufacturers to keep an extended warranty valid, so a service every 12 months is the standard interval.

Does a service keep my boiler warranty valid?

Yes, Worcester Bosch, Vaillant, Baxi, Ideal and the other major boiler brands require a documented annual service to honour their extended warranties, and a Silver Saints service produces a dated written report you can keep as proof.

Is a boiler service the same as a Gas Safety Certificate?

No, a boiler service is a maintenance and efficiency check, while a Landlord Gas Safety Record (CP12) is the annual legal safety check a landlord must have, and Silver Saints can carry out either or both on the same visit.

Which London areas do you cover for boiler servicing?

Silver Saints services gas boilers across all 32 London boroughs and the City of London, from inner London out to boroughs such as Bromley, Croydon, Ealing and Richmond, plus the adjacent TW, KT, CR and BR postcodes.

Customer Reviews

Our customers across London rate us highly on the main review sites:

• Google Customer Reviews
• Trustpilot Customer Reviews
• Checkatrade Customer Reviews
• Yell Customer Reviews

Silver Saints gas boiler service in London

A Silver Saints gas boiler service is a fixed-price annual maintenance and safety inspection for gas boilers in London homes, carried out by a Gas Safe registered engineer, covering a visual compliance check, a pre-service fire-up and gas rate reading, removal of the casing to examine and clean the burner, injector, heat exchanger, condense trap, probe, seals and fans, a flue gas analysis, a gas-tightness test and a written service report, with the service also keeping most manufacturer warranties valid. It covers all 32 London boroughs and the City of London plus the TW, KT, CR and BR postcodes, across modern flats, period houses and conversions, is carried out Monday to Saturday 8am to 5pm, and is a fixed price of £100 plus VAT with no call-out fee, while a separate boiler repair is charged at £98 plus VAT per hour. Silver Saints is rated 4.9 stars on Google from over 1,000 reviews and is fully insured. To book, call 0207 0999 199 or visit bookings.silversaints.com.

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