Coverage: W3, W5, W7, W13, UB1, UB2, UB5 and UB6, plus the NW10 fringe around North Acton and Park Royal.
What this covers: annual boiler servicing and maintenance by a Gas Safe registered engineer — inspection, combustion and safety checks, cleaning where needed, and a service record. Landlord gas safety checks (CP12) too, where you need both.
Not this page: a boiler that’s broken is boiler repair; a brand-new boiler is boiler installation; cold radiators with a working boiler are usually central heating repair.
Costs: see what it costs.
Availability: planned work — book ahead, ideally before winter.

Jump to: What a service involves · Service vs gas safety check · Why it’s worth it · Safety first · By district · Costs · FAQs

What a service actually involves

A proper boiler service goes well beyond a glance and a tick-box. A Gas Safe registered engineer typically removes the boiler’s cover to inspect the key components — burner, heat exchanger, ignition and electrodes, fan, seals and condensate trap — cleaning where deposits have built up; checks the gas pressure and that gas is burning correctly, ideally with a flue-gas analyser; inspects the flue and its terminal for safe operation and discharge; tests the expansion vessel and sets system pressure; checks the boiler’s safety devices and controls; and fires the boiler to listen for unusual noises. The findings and combustion readings are recorded on a service record — on a Benchmark checklist for many boilers — which is the document your warranty and any future buyer will want to see.

A service is not a boiler repair: if the engineer finds a fault, fixing it is separate work (see boiler repair). And occasionally an engineer can’t finish on the first visit — seized case screws, failed seals, a blocked condensate trap, no safe service clearance, or a manufacturer-specific service kit not to hand can mean a return — so it’s worth flagging a boxed-in or awkwardly sited boiler, and having the make and model ready, when you book.

A service is not the landlord’s gas safety check

These two get confused constantly, and the difference matters. A gas safety check — the Landlord Gas Safety Record, sometimes called a CP12 — is a legal duty for landlords: under the Gas Safety (Installation and Use) Regulations 1998 (Regulation 36), a landlord must arrange an annual safety check, by a Gas Safe registered engineer, on the gas appliances and flues they own and provide for the tenant’s use⁵ — keeping the record for two years and giving a copy to tenants.⁴ A tenant’s own appliance is the tenant’s responsibility. The check confirms those appliances and flues are safe — operating pressure, combustion, ventilation, flue. Gas installation pipework isn’t part of that annual appliance-and-flue check, though the landlord must still keep it maintained and safe.

A boiler service is a maintenance check of one appliance that goes deeper than the safety side: inspecting and cleaning components and testing performance, not just confirming it’s safe to use. A service is not legally required for an owner-occupier, but it’s recommended annually and is usually a condition of keeping the manufacturer’s warranty valid. The two overlap but aren’t the same — and a Gas Safe registered engineer can carry out both in one visit, which is what most landlords arrange. If you rent, the legal annual gas safety check is your landlord’s responsibility; heating and hot water are also their repairing obligation under Section 11 of the Landlord and Tenant Act 1985.⁶

Whoever does the work must be Gas Safe registered for it — HSE requires anyone carrying out gas work to be on the Register, with the qualified categories shown on the engineer’s ID card¹ — and you can confirm any engineer on the Gas Safe Register.²

Why an annual service is worth it

Three reasons, in plain terms. Warranty: most manufacturers require an annual service by a Gas Safe registered engineer to keep the guarantee valid — miss it and a later claim can be refused. Safety: a service is the routine way faults and unsafe combustion get caught before they become dangerous, which is the front line against carbon monoxide (see Safety first). Efficiency: a boiler that’s clean, correctly set and free of issues runs as it should, where a neglected one drifts toward higher running costs.

There’s a system-water side too. The British Standard code of practice for domestic heating water, BS 7593:2019+A1:2024, recommends an annual on-site water test to check the inhibitor level and system cleanliness, with the inhibitor re-dosed every five years (or verified by laboratory test), and an in-line filter on the system.⁷ In Ealing’s hard water — confirmed by Affinity Water¹³ and Thames Water across the borough’s two supply areas¹⁴, with the Drinking Water Inspectorate linking hardness to scale¹² — keeping on top of that protection matters, since scale and sludge can shorten a heat exchanger’s life.

Safety first

Gas. If you smell gas or suspect a leak, treat it as the priority over everything else. National Gas sets out the steps: call the National Gas Emergency Service immediately, free, on 0800 111 999; don’t turn switches on or off, avoid naked flames and don’t smoke; open doors and windows if it’s safe; turn the gas off at the meter control if you can reach it; and leave the property if the smell is strong or anyone feels unwell, calling from outside.⁸

Carbon monoxide. CO is colourless and odourless, which is why a routine service matters. Gas Safe lists the warning signs of CO poisoning — headaches, dizziness, nausea, breathlessness, collapse and loss of consciousness — with symptoms that ease when you leave the house pointing strongly at CO; the signs of a leak include a floppy yellow or orange flame rather than a crisp blue one, dark sooty staining around the appliance, pilot lights that frequently blow out, and increased condensation.³ If you suspect CO — or a CO alarm sounds — treat it as an emergency: get fresh air and open doors and windows, turn off the suspected appliance if it’s safe, leave the property, and call the Gas Emergency Helpline on 0800 111 999. Get medical advice as soon as possible — NHS 111 if you suspect CO poisoning, or 999 or A&E for severe symptoms such as difficulty breathing, sudden confusion or loss of consciousness.³ Don’t use the appliance again until a Gas Safe registered engineer confirms it’s safe. A working audible CO alarm to BS EN 50291 is the protection HSE points to, and a service is the moment to check yours works.⁹

Electrics. A boiler is also an electrical appliance; any associated electrical work in the dwelling beyond the boiler’s own connection falls under Part P of the Building Regulations — an electrician’s domain.

Water. A service is a good moment to confirm you know your inside stop valve and the heating system’s filling and isolation points, so you can act if anything ever leaks.

Find a verified boiler servicing engineer by district

Servicing isn’t strongly postcode-specific — the checks are the same borough-wide — but Ealing’s housing and water shape a couple of things worth knowing.

Acton (W3, parts NW10). Period terraces with retrofitted heating and the newer Acton Gardens blocks¹¹, where a boiler boxed into a kitchen cupboard needs safe access to its case and flue for a proper service. On the North Acton and Park Royal (NW10) fringe, newer and mixed-use blocks tend to run modern systems where access can depend on building management.

Ealing (W5, W13). Conversion flats where a boiler serves one unit, and where a boiler boxed into a small kitchen, or a flue routed through shared structure, can mean the flue route and safe access need arranging before the engineer can complete a proper service — sometimes with freeholder or managing-agent permission.

Greenford (UB6, parts UB5) and Northolt (UB5). Housing of varied ages and system types — and in some estate and purpose-built blocks, including parts of estates such as Golf Links in south Greenford¹⁵, heating and hot water can be communal: supplied by a block plant room or a heat interface unit (HIU) rather than an individual gas boiler, so there may be no private boiler to service, and the landlord or managing agent arranges it.

Hanwell (W7). Older houses where boilers can sit in airing cupboards or awkward positions from earlier installs, with legacy pipework around them — worth flagging access and service clearance when you book.

Perivale (UB6). Many older homes where boilers vary in age, often with older pipework layouts; an older boiler still under warranty especially benefits from keeping the annual service — and the system-water check — up to date.

Southall (UB1, UB2). Behind the Broadway and South Road parades, flats above shops can mean access to a boiler cupboard or flue depends on landlord or building access rather than the tenant alone. Hard-water scale is present here as across the borough.

What it costs

The first questions are what the service covers, whether it includes a flue-gas analysis and a system-water check, and — if you’re a landlord — whether you need the gas safety check, the service, or both.

Editorial estimate only, for orientation. These are NOT regulated rates, NOT market data and NOT a published cost survey — appliance, access and any parts change the price. Always get a written quote.

There is no official price list for boiler servicing in Ealing. Local cost context: Ealing is inside London’s ULEZ¹⁶, and the council’s infrastructure evidence records half the borough’s road network as covered by controlled parking zones.¹⁷ For reading any quote line by line, see how to read a plumbing quote.

Frequently asked questions

Why verified plumbers — not a general directory

A service is only as good as the engineer doing it — and a “service” that’s really a five-minute glance, or worse, work by someone not Gas Safe registered, is no protection at all. That’s why every listing here is checked before going live and re-verified annually: we confirm the business is legitimately trading and verify the named contact, we check evidence of public liability insurance, and we confirm the plumber covers Ealing’s W and UB postcodes before a profile is approved.

Because this is gas work, the central check is Gas Safe registration — we confirm it directly with the Gas Safe Register, and you can and should check any engineer’s registration and qualified categories yourself. For water-fittings work on the wet side of a system, plumbers can also be looked up on WaterSafe. Profiles may be suspended or removed if credentials lapse or credible concerns are raised — see the full verification process →

There’s no pay-to-play ranking of listings and no customer middleman fee: enquiries go directly to the plumber.

Related areas

Verified boiler servicing engineers across Ealing’s neighbourhoods, including:

• Acton
• Brentham Garden Suburb
• Central Greenford
• Dormers Wells
• Ealing Broadway
• Ealing Common
• East Acton
• Greenford
• Greenford Broadway
• Hanger Hill
• Hanwell
• Hanwell Broadway
• Lady Margaret
• Montpelier
• North Acton
• North Ealing
• North Greenford
• North Hanwell
• Northfields
• Northolt
• Northolt Mandeville
• Northolt West End
• Norwood Green
• Perivale
• Pitshanger
• South Acton
• South Ealing
• Southall
• Southall Broadway
• Southall Green
• Southall West
• Walpole
• West Ealing

Related services

Other verified plumbing services in Ealing:

• Emergency Plumber in Ealing
• Burst Pipes in Ealing
• Leak Detection in Ealing
• Blocked Drains in Ealing
• Toilet Repairs in Ealing
• Tap Repair & Installation in Ealing
• General Plumbing in Ealing
• Bathroom Plumbing in Ealing
• Kitchen Plumbing in Ealing
• Washing Machine & Dishwasher Installation in Ealing
• Boiler Repair in Ealing
• Boiler Installation in Ealing
• Central Heating Repair in Ealing
• Commercial Plumbing in Ealing

Related guides

• Boiler Repair or Replace? A London Guide 2026
• Combi vs System Boiler — A UK Guide 2026
• London Landlord Plumbing Compliance Checklist 2026
• How to Read a Plumbing Quote — A London Homeowner’s Guide 2026

An annual service is the cheapest insurance a boiler gets — it keeps the warranty alive, the running costs sensible and, above all, the appliance safe. The verified plumbers listed above are Gas Safe registered, will tell you plainly whether you need a service, the landlord’s gas safety check, or both, and leave you with the record to prove it was done.

Contact verified boiler servicing plumbers in Ealing ↑

← Back to all plumbing services in Ealing

Last reviewed: June 2026 by Adiel Khan — SFEDI-accredited business advisor 20+ years experience (South East Enterprise Ltd) and operator of VerifiedPlumbers. LinkedIn ↗

This page is checked for compliance and regulatory accuracy against the regulations and bodies cited on this page, including the Gas Safety (Installation and Use) Regulations 1998 and HSE guidance, Section 11 of the Landlord and Tenant Act 1985, BS 7593:2019+A1:2024, National Gas, Gas Safe Register, the Drinking Water Inspectorate, Affinity Water, Thames Water, Ealing Council and Transport for London. Source links are provided within this page where relevant.

Sources & further reading

1. HSE (who can carry out gas work — Gas Safe Register, ID-card categories) — https://www.hse.gov.uk/gas/domestic/newschemecontract.htm
2. Gas Safe Register (check an engineer) — https://www.gassaferegister.co.uk/
3. Gas Safe Register (carbon monoxide poisoning — symptoms, signs and what to do) — https://www.gassaferegister.co.uk/gas-safety/carbon-monoxide-poisoning/
4. HSE (landlords’ gas safety — dealing with tenants, records) — https://www.hse.gov.uk/gas/landlords/dealing.htm
5. HSE (gas safety checks — who needs them; Regulation 36, appliances and flues the landlord owns and provides) — https://www.hse.gov.uk/gas/landlords/safetycheckswho.htm
6. Landlord and Tenant Act 1985, Section 11 (landlord repairing obligations) — https://www.legislation.gov.uk/ukpga/1985/70/section/11
7. BSI — BS 7593:2019+A1:2024 (Code of practice for the preparation, commissioning and maintenance of domestic central heating and cooling water systems) — https://knowledge.bsigroup.com/products/code-of-practice-for-the-preparation-commissioning-and-maintenance-of-domestic-central-heating-and-cooling-water-systems-1
8. National Gas (gas emergency — what to do, 0800 111 999) — https://www.nationalgas.com/emergency-contacts
9. HSE (domestic gas safety FAQs — CO alarms to BS EN 50291; landlord maintenance and gas safety-check duties) — https://www.hse.gov.uk/gas/domestic/faqs.htm
10. Ealing Council (reporting a housing repair) — https://www.ealing.gov.uk/info/201093/repairs_-_council_property/2742/reporting_a_housing_repair
11. Ealing Council (South Acton Estate regeneration) — https://www.ealing.gov.uk/info/201104/housing_regeneration/377/south_acton_estate
12. Drinking Water Inspectorate (hardness and scaling) — https://www.dwi.gov.uk/consumers/learn-more-about-your-water/water-hardness-hard-water/
13. Affinity Water (water hardness) — https://www.affinitywater.co.uk/water-quality/hardness
14. Thames Water (hard water) — https://www.thameswater.co.uk/help/water-and-waste-help/water-quality/hard-water
15. Ealing Council (Golf Links estate — about the estate) — https://www.ealing.gov.uk/site/scripts/documents_info.php?documentID=372
16. Transport for London (Ultra Low Emission Zone) — https://tfl.gov.uk/modes/driving/ultra-low-emission-zone
17. Ealing Council Infrastructure Delivery Plan, Part One: Infrastructure Baseline Report, Feb 2024 (CPZ coverage) — https://www.ealing.gov.uk/download/downloads/id/19508/part_one_infrastructure_baseline_report.pdf