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No heat or hot water usually means the boiler — but a few of the causes you can check yourself before calling anyone. Verified Gas Safe registered engineers covering Newham (E6, E7, E12, E13, E15, E16, E20) — listed below.
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⚠️ Smell gas, or a carbon monoxide alarm sounding? Leave and call the National Gas Emergency Service on 0800 111 999 from outside — free, 24h. Feeling unwell with headaches or dizziness near the boiler? Treat it as an emergency. Full safety steps ↓
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VerifiedPlumbers is a directory: you choose an engineer below and contact them directly. We don’t attend, quote or carry out work, and availability is set by each engineer — ask when you call.
Coverage: Stratford, Stratford City, East Village, West Ham, Plaistow, Upton Park, East Ham, Forest Gate, Manor Park, Little Ilford, Green Street, Canning Town, Custom House, Beckton, Royal Docks, Silvertown, North Woolwich, West Silvertown, Maryland, Gallions Reach, Cyprus, Plashet, South Beckton and Temple Mills — covering E6, E7, E12, E13, E15, E16 and E20.
What this covers: the boiler itself when it’s the fault — no heat or hot water, a fault code or lockout, a boiler that won’t fire, or one that’s leaking. The sections below cover what you can safely check first, and where the line is that means a Gas Safe engineer.
Routing: if the boiler runs but the radiators stay cold or the heat’s patchy, that’s the central heating system, not the boiler; a new boiler or the annual service each have their own page.
Costs: a diagnostic call-out plus parts and labour, with common repairs in a predictable range. See What it costs below.
Jump to: Check these first · Is it the boiler or the system? · Find a verified engineer by district · Safety first · What it costs · FAQs
Check these first
Before booking an engineer, three quick checks resolve a surprising number of boiler faults — and they’re all safe to do yourself.
Pressure. Look at the gauge on the boiler. The healthy range is usually around 1 to 1.5 bar when the system’s cold; below 1 bar, the boiler may lock out. You can re-pressurise using the filling loop — the silver flexible hose under the boiler — opening the valves slowly until the gauge reaches about 1.5 bar, then closing them and resetting. Do it the way your boiler’s manual shows. If the pressure keeps dropping and you’re topping up repeatedly, that points to a leak and needs an engineer.
The condensate pipe. In cold weather, the white plastic pipe running outside from the boiler can freeze and shut the boiler down — by far the most common winter lockout. Thaw it gently with warm (not boiling) water or a hot-water bottle, then reset the boiler.
Power, gas and the fault code. Check the boiler has power, the thermostat is calling for heat (some boilers show the fault on a smart thermostat, not the boiler), and other gas appliances are working — if nothing gas-powered works, it’s a supply issue. Note any fault code on the display before you call; codes are manufacturer-specific, and quoting it helps an engineer diagnose faster. Reset the boiler once — repeated resets just mask the underlying fault.
Where to stop. Re-pressurising, resetting once, thawing the condensate and checking power are safe. Opening the boiler casing, or anything on the gas or sealed combustion side, is not — that’s strictly for a Gas Safe registered engineer.
Is it the boiler or the system?
It’s worth knowing which problem you’ve got, because it decides which page you need.
It’s the boiler (this page) when there’s no heat and no hot water at all, a fault code or lockout, the boiler won’t fire, or the boiler itself is leaking. These are appliance faults — ignition, fan, pump, diverter valve, PCB, gas valve — and most are Gas Safe work.
It’s the system when the boiler runs fine but some radiators stay cold, the heat is patchy, or there are cold spots — that’s air, sludge, a pump or balancing, covered on central heating repair. And if the boiler is sound but old and repairs are mounting up, the question becomes repair or replace.
One Newham factor worth flagging: this is a hard-water area. Thames Water classes all its supplies as hard, and over time limescale builds up in boilers and heat exchangers, which can shorten a boiler’s life and bring on faults sooner — one reason a system filter and regular servicing pay off here.1
Find a verified engineer by district
Newham’s boiler work splits by building as much as by fault.
Stratford, Stratford City, East Village and the Royal Docks (E15 / E16 / E20). Modern managed apartment blocks, often with communal flues, plant rooms or shared heating arrangements, where access to the boiler or flue can involve the building manager — worth confirming before an engineer attends. With flats now 54.6% of Newham’s dwellings (the largest rise of any local authority in England, the ONS records), access — a concierge, a plant-room key, managing-agent permission — is often part of the repair, not just the fault itself.2
East Ham, Forest Gate, Manor Park and Little Ilford (E6 / E7 / E12). The terraced and converted-house belt, where individual combi and system boilers are the norm and older installations — plus years of hard-water scale — bring more repair calls.
Plaistow, West Ham and Green Street (E7 / E13 / E15). Terraced streets and rentals; in a let property the boiler is the landlord’s responsibility, so a tenant with no heat should report it to the landlord first.
Canning Town and Custom House (E16). Part of Newham’s £3.7 billion regeneration programme — 10,000 new homes, 3,500 already completed or on site, the council says — so this is newer managed and mixed-use building stock with concealed services, where a boiler in a communal or plant arrangement needs building-management coordination as well as a Gas Safe engineer.3
Safety first
A boiler is a gas appliance, so a fault can involve the two gas risks — a leak, and carbon monoxide from poor combustion.
If you smell gas or suspect a leak. Natural gas has a strong “rotten egg” smell added to it. The Health and Safety Executive and the National Gas Emergency Service set out a clear order:4
- Don’t touch anything electrical — no switches on or off, no naked flames, no smoking.
- Open doors and windows if it’s safe, to ventilate.
- Turn off the gas at the meter control valve if you know where it is and can reach it safely (unless the meter is in a cellar).
- Leave the property if the smell is strong or you feel unwell.
- Call the National Gas Emergency Service on 0800 111 999 from outside — free, 24 hours.
Carbon monoxide. A boiler that’s burning poorly can produce carbon monoxide (CO), which the Health and Safety Executive warns you cannot see, taste or smell.5 Symptoms include headaches, dizziness, nausea, breathlessness and tiredness — often easing when you leave the house. Every home with a gas appliance should have an audible CO alarm; if one sounds, treat it as an emergency and call the gas line above. Don’t keep running a boiler you suspect is faulty.
Gas work is Gas Safe only. By law, work on a gas appliance, its supply or flue must be done by a Gas Safe registered engineer — the HSE requires the business to be on the Gas Safe Register for gas work.6 Always ask to see the ID card, which shows what work the engineer is registered for.
Renting? Your landlord is responsible for the boiler and for an annual gas safety check. If you’re a Newham Council tenant, no heating or hot water is an emergency repair on the council’s line 0203 373 5500, which can’t be raised online — and you shouldn’t book a private engineer for a council-owned boiler, because gas work on council homes is done by the council’s own Repairs & Maintenance Service, whose staff carry a Newham Council/RMS ID card.7 If you rent privately, report the fault to your landlord or agent in writing and keep copies, as Newham Council asks for that evidence if it later acts on disrepair; for a gas smell, leak or no water, use the emergency routes above first.8 Newham also operates property licensing across most of the borough — the wards except Royal Victoria and Stratford Olympic Park — and a landlord’s licence requires evidence of the gas safety check, so a working, certificated boiler is part of letting legally here.9
What it costs
Boiler repair is usually a diagnostic call-out plus parts and labour. The figures below are a general guide for London, not a quote.
| Job type | Indicative range (London) |
|---|---|
| Diagnostic call-out | £80–£150 |
| Replace a faulty part (pump, valve, sensor) | £150–£450 |
| Replace a PCB | £300–£600 |
| Replace a fan | £250–£500 |
| Out-of-hours emergency attendance | £150–£300+ |
Editorial estimate only. These figures are an indicative guide to help you plan — they are not regulated rates, not market data, and not a published cost survey. Always get the fault diagnosed and the price agreed before work starts. If an old boiler is costing more in repeated repairs, weigh it against a replacement — see repair or replace your boiler. For reading a quote, see how to read a plumbing quote and the London plumbing costs guide.
Newham is within the London-wide Ultra Low Emission Zone, which Transport for London operates 24 hours a day across every London borough, with a daily charge for vehicles that don’t meet its emissions standards.10 An engineer using a non-compliant vehicle may factor that into their pricing, so it’s reasonable to ask.
Frequently asked questions
Usually yes.
If the gauge reads below 1 bar, re-pressurise using the filling loop until it’s about 1.5 bar, following your manual, then reset.
But if you’re topping it up repeatedly, that points to a leak — stop guessing and get an engineer.
Very often a frozen condensate pipe — the white plastic pipe outside.
Thaw it gently with warm water and reset the boiler.
If that doesn’t restore it, or there’s a fault code, it needs a Gas Safe engineer.
Note it down, because codes are specific to each make.
Try a single reset, and check the basics — pressure, condensate and power.
If the code returns, quote it to the engineer when you call; it speeds up diagnosis.
Only a Gas Safe registered engineer can legally work on a gas boiler’s gas or sealed components.
The safe DIY checks above don’t need one, but anything inside the casing does.
Ask to see the Gas Safe ID card.
A leaking boiler should be turned off and looked at promptly.
Water and electrics don’t mix, and a leak can damage internal parts.
It’s an engineer’s job, not a DIY fix.
The council treats no heating as an emergency repair on 0203 373 5500, which can’t be booked online.
Its own RMS team does the gas work.
Use that route rather than a private engineer.
Related plumbing services in Newham
- Central Heating Repair in Newham — cold radiators or patchy heat when the boiler’s fine.
- Boiler Servicing in Newham — the annual service and gas safety check.
- Boiler Installation in Newham — when repair no longer makes sense.
- Emergency Plumber in Newham — an urgent no-heat or leaking-boiler situation.
See all verified plumbing services in Newham →
Related guides
- Should You Repair or Replace Your Boiler? — London 2026 — when repairs stop being worth it.
- Boiler Fault Codes — A London Homeowner’s Guide 2026 — what the display is telling you.
- London Hard Water — The Complete Homeowner & Landlord Guide 2026 — how scale shortens boiler life in Newham.
- How to Read a Plumbing Quote — A London Homeowner’s Guide 2026 — checking a repair quote.
Check the three basics, then leave the gas side to a registered engineer. A boiler that won’t fire is often a lost-pressure or frozen-condensate problem you can fix in five minutes — but a fault code that returns, a leak, or anything behind the casing is Gas Safe work, and a poorly burning boiler is a carbon-monoxide risk worth taking seriously. Run the safe checks, note the fault code, and call a verified Newham engineer from the list above.
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Last reviewed: May 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 bodies and regulations cited on it: Thames Water, the Health and Safety Executive, the Gas Safe Register, the Gas Safety (Installation and Use) Regulations 1998, the Office for National Statistics, Newham Council and Transport for London. Source links are provided within this page where relevant.
Sources & further reading
- Thames Water — Hard water (all the water in the Thames Water region is hard; limescale scales hot-water systems and boilers over time).
- Office for National Statistics — Housing in England and Wales: 2021 compared with 2011 (Newham had the largest local-authority increase in flats/maisonettes/apartments, from 46.4% of dwellings in 2011 to 54.6% in 2021).
- London Borough of Newham — Regeneration: Canning Town and Custom House (£3.7 billion regeneration programme of 10,000 new homes, 3,500 already completed or on site).
- National Gas — Emergency Contacts (gas-emergency sequence and the National Gas Emergency Service number 0800 111 999).
- HSE — Domestic gas safety FAQs (carbon monoxide cannot be seen, tasted or smelled; symptoms; recommendation to fit a CO alarm).
- HSE — Gas Safe Register (legal requirement, under the Gas Safety (Installation and Use) Regulations 1998, for a business to be on the Gas Safe Register to carry out gas work).
- London Borough of Newham — Council tenant repairs (no heating is an emergency repair telephoned to 0203 373 5500 and not raised online; gas work by the council’s Repairs & Maintenance Service, whose staff carry a Newham Council/RMS ID card).
- London Borough of Newham — Emergency repairs when renting privately (report to the landlord first and keep written evidence; the council can act on disrepair where a landlord fails to repair).
- London Borough of Newham — Rented property licensing (selective licensing scheme, launched 1 June 2023, applies in all wards except Royal Victoria and Stratford Olympic Park; a licence requires evidence of gas and electrical safety checks).
- Transport for London — Ultra Low Emission Zone (London-wide ULEZ, 24/7, daily charge for non-compliant vehicles).