Verified boiler repair engineers across Wandsworth — pressure faults, fault codes, no heating or hot water, ignition failure, diverter and pump faults. Covering SW4, SW8, SW11, SW12, SW15, SW16, SW17 and SW18. Find directory-listed engineers below.
✅ Checked before listing — identity, insurance, trading presence, Gas Safe (where relevant).
How we verify →
✅ Workmanship guarantee badges on listings — 1, 3, 6 or 12 months
⚠️ Smell gas or suspect CO? Leave the property, then call the National Gas Emergency Service on 0800 111 999 (24/7).¹ More on CO safety ↓
Contact verified boiler repair engineers in Wandsworth ↓
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No paid placements go live without verification — listing comes after checks, not before.
When you call: give the fault, boiler make and model, your postcode and any fault code. Then confirm the diagnostic cost, availability, and whether the visit is purely to diagnose or may include repair on the day.
What’s happening with your boiler?
Many common boiler faults can be repaired, depending on age, condition and parts availability. Recurring issues or major component failures sometimes make replacement the more practical call — a diagnostic visit helps determine which. If you’re already weighing repair vs replacement, see our Should I Repair or Replace My Boiler? guide.
- No heating AND no hot water, winter → urgent. Call a listed engineer above.
- Losing pressure → leak, expansion vessel or filling-loop fault — commonly repairable depending on the cause identified during diagnosis
- Showing a fault code → specific component issue, diagnosis required. Tell the engineer the code when you call.
- Intermittent heating or ignition failure → control or sensor fault
- Partial heating (some radiators cold, or hot water but no heating) → often a diverter or pump fault — not immediately urgent but worth booking
- Boiler 10+ years old with recurring faults → consider whether replacement is more cost-effective (see guide above)
How a boiler repair visit usually works
Most boiler repair jobs start with a diagnostic. The first visit confirms the fault and whether parts are needed. Simple faults (pressure, thermostat, filling loop) can often be fixed in one visit. Complex failures (heat exchanger, PCB, fan) usually mean parts ordered and a return visit.
If parts are required, the engineer should quote before proceeding — you decide whether to go ahead with the repair or get a second opinion.
Gas Safe registration — the legal requirement for gas boiler work
Under the Gas Safety (Installation and Use) Regulations 1998, gas work must be done competently — and anyone carrying out gas work as a business or contractor must be Gas Safe registered.²
Do not allow anyone who is not Gas Safe registered to carry out gas work on your boiler. You can verify any engineer’s current registration and work categories at gassaferegister.co.uk⁴ before work begins.
About this service –
Understanding boiler repair in Wandsworth
Gas and carbon monoxide safety — when to stop and call
Boilers are gas appliances. Some signs require immediate action — they are not “wait until tomorrow” repair calls.
If you smell gas, suspect a gas leak, or your CO alarm sounds:
- Leave the property with everyone in it. Don’t switch on lights, use phones, or operate any electrical switches inside the property.
- Call the National Gas Emergency Service on 0800 111 999 (24 hours a day, 7 days a week) from outside the property.¹
- Don’t return until the gas emergency service confirms the property is safe.
As a general safety precaution before the engineer arrives, open windows to ventilate, avoid naked flames, and do not operate electrical switches. HSE guidance is that you should not attempt to turn the gas supply off unless you know how to do so safely.¹³
If you or anyone in the household has symptoms that may indicate carbon monoxide poisoning — headaches, dizziness, nausea, breathlessness, collapse or loss of consciousness — and you suspect CO exposure, treat it as urgent:
- Get out into fresh air immediately and switch off fuel-burning appliances on your way out if you can do so safely
- Call 999 for suspected CO poisoning. NHS guidance is to call 999 rather than drive to A&E.¹⁶ Tell them you suspect carbon monoxide poisoning
- Or go to A&E with someone else driving — HSE guidance is to seek urgent medical advice from either your GP or an A&E department¹⁷
- NHS 111 is for “feeling unwell or worried” after the exposure source has been removed and you don’t have clear symptoms of poisoning
- Also call the National Gas Emergency Service on 0800 111 999 if you suspect a gas appliance is the source¹
Only once the gas supply has been made safe should you call a Gas Safe registered engineer to repair the boiler.
If you are a Wandsworth Council tenant, also call the Wandsworth Council Joint Control Centre on 020 8871 8999 once the National Gas Emergency Service has been contacted.⁷
Common boiler faults — and how Wandsworth housing stock shapes them
Pressure loss, fault codes, no hot water, no heating, failed ignition and noisy operation are common reasons residents call a boiler repair engineer.
A Gas Safe engineer will establish whether the fault is pressure-related, a component failure or a control-system issue before recommending repair.
Wandsworth’s housing mix affects what engineers find on site:
Victorian and Edwardian terraces in Tooting, Balham, Earlsfield, Southfields and parts of Battersea — many have combi boilers retrofitted into older pipework, sometimes with the boiler in a kitchen or bathroom location that makes service access awkward. Back boilers have largely been replaced but the pipework routing often reflects the original layout.
Inter-war semis in Southfields and Furzedown — often still running gravity-fed systems with a cylinder in the airing cupboard and a tank in the loft, or converted to combi with some of the original pipework retained. A diagnostic on an older conversion often traces faults back to the conversion itself.
Post-war council blocks across the borough — a mix of individual boilers and centralised communal heating. See the sections below for who to call.
Modern high-density new-build around Nine Elms and Battersea Power Station — typically unvented cylinders with system boilers or centralised district heating. Installation or replacement of an unvented hot water cylinder is controlled under Approved Document G and should be carried out by a competent person, typically an engineer with recognised G3/unvented hot water competence.⁵ Notifiable installation or replacement work must be notified to Building Control or self-certified through a competent person scheme. For servicing or repair, ask for evidence of appropriate unvented/G3 competence and a written service/repair record.
Hard water and boiler failure in Wandsworth
Wandsworth sits in Thames Water’s hard water area. Thames Water confirms hard water can lead to limescale build-up on household appliances and fittings⁶ — a material factor in boiler failure across Wandsworth postcodes.
In practical terms, limescale accumulates on heat exchangers, diverter valves and domestic hot water plate heat exchangers. A combi boiler that once delivered hot water instantly but now takes a while to heat up, or runs lukewarm on high flow, is often suffering from scale on the plate heat exchanger. Kettling — a boiler that sounds like a kettle on boil — is frequently limescale on the main heat exchanger.
Annual servicing by a Gas Safe registered engineer can help identify developing issues early. Prevention in hard water areas often also depends on manufacturer-approved measures such as inline scale inhibitors, magnetic system filters, or water softeners — ask your engineer what is appropriate for your boiler and system. If your boiler is losing pressure, failing to heat water fully or showing fault codes, contact a Gas Safe registered engineer for diagnosis before the fault escalates.
Council tenants in Wandsworth — who to call for boiler repair
If you live in a Wandsworth Council home with a council-owned boiler, heating and hot water repairs go through the council’s appointed contractor, not a private engineer.
Which contractor covers your area
Wandsworth operates a geographic contractor split for boiler repairs in council properties. The right contractor depends on where in the borough you live:⁷
- Battersea, Wandsworth town or Earlsfield → PH Jones: 033 3004 2333 or 080 0023 4069 (email wbcrepairs@phjones.com)
- Putney, Roehampton or Tooting → T. Brown: 080 0977 8472 or 020 8786 1244 (email repairs@tbrown.com)
- Wandsworth Council block with centralised heating and hot water (paying heating and hot water charges) → Smith & Byford: 020 8722 3431 or 080 8196 1791 (email wandsworth.gas@smithandbyford.com)
The council’s Housing contacts page⁸ lists an additional PH Jones number (020 3657 0304) for the Battersea / Wandsworth / Earlsfield area. If you aren’t sure which contractor covers your property, contact your area housing team.⁸
Out-of-hours emergencies
For emergency out-of-hours heating or hot water loss, call the Wandsworth Council Joint Control Centre on 020 8871 8999 — 24 hours a day.⁷
Annual gas safety check
Under the Gas Safety (Installation and Use) Regulations 1998, as your landlord the council must arrange an annual gas safety check by a Gas Safe registered engineer and provide you with a copy of the Landlord Gas Safety Record.² ⁹ The document is sometimes called a “CP12” — there is no legal document called a “CP12”; that is an industry term for the Landlord Gas Safety Record.
Communal heating in Wandsworth — a different repair route
A number of Wandsworth council estates are served by communal (centralised) heating and hot water systems rather than individual boilers in each flat. Residents on these systems pay a heating and hot water charge through their rent account.¹⁰
If you live in a Wandsworth Council block on a centralised system, boiler faults in your flat are usually thermostat, radiator or local-pipework issues — the plant supplying the whole block is maintained by Smith & Byford (contact details above).⁷
Do not attempt to fix a communal system yourself. If you’re unsure whether you’re on an individual boiler or the communal system, contact your area housing team⁸ before arranging any work.
The council is regenerating the Winstanley and York Road estates in Battersea and the Alton estate in Roehampton. If you live on either estate, check with your housing officer before assuming your system type, and see the council’s Winstanley and York Road regeneration page¹¹ or Alton regeneration updates¹² for the current position.
Private tenants in Wandsworth — landlord obligations for boiler repair
Under the Gas Safety (Installation and Use) Regulations 1998, landlords must arrange an annual gas safety check by a Gas Safe registered engineer and provide tenants with a copy of the Landlord Gas Safety Record within 28 days of the check being completed.²
Wandsworth Council states that if your boiler is broken, you must contact your landlord or agent first, and the landlord or agent should respond within 48 hours to acknowledge your report and confirm when an engineer will visit.¹⁴ This is council guidance, not a statutory deadline, but it reflects what a reasonable landlord should do.
In winter months, you should expect the boiler to be fixed within five working days — longer if parts or a replacement are required. Your landlord should provide temporary heaters while the work is arranged.¹⁴
If your landlord does not respond within five working days, or there are unreasonable delays, you can report the disrepair to Wandsworth Council.¹⁵
Keep photographs, texts and emails of every exchange — the council will ask to see this evidence before intervening.¹⁵
What boiler repair costs in Wandsworth
Indicative internal estimates based on recent London boiler repair jobs (2025–2026), not regulated rates — no official pricing data exists for private boiler repair. Always confirm pricing before work begins. Actual costs vary by boiler type, fault complexity, parts required and urgency. VAT may apply.
| Service | Typical range (London) |
|---|---|
| Diagnostic / callout (standard hours) | from £80 |
| Emergency callout (out of hours / weekend) | from £150 |
| Hourly labour (standard) | from £80 |
| Hourly labour (emergency / out of hours) | from £120 |
| Simple repair (e.g. pressure fault, thermostat, filling loop) | from £150 |
| Complex repair (e.g. heat exchanger, PCB, fan) | from £300 |
Diagnostic visits identify the fault; the repair itself is usually priced separately unless the engineer confirms it is included. If parts are required, the engineer will quote before proceeding. Ask for a written quote before any work begins.
See the full London Plumbing Costs Guide →
Why verified engineers — not a general directory
Engineers listed here for gas boiler work are Gas Safe registered. Every listing is verified at the time of listing — the checks below are completed before the profile goes live.
You contact and pay the engineer directly. This directory verifies listings before they go live, but does not carry out, manage or guarantee the work.
What we check before an engineer is listed in Wandsworth:
- Identity and trading details — we confirm the business is legitimately trading, verify the registered business name, and verify the business identity and named contact behind the listing. No anonymous profiles go live.
- Gas Safe registration — where a plumber offers gas work, we confirm their Gas Safe registration number directly with the Gas Safe Register, checked against the engineer’s name and the specific gas work categories they are qualified to carry out.
- Public liability insurance — every listed engineer is required to hold public liability insurance, and evidence of cover is checked at the point of listing.
- Service coverage — we confirm the engineer actually covers Wandsworth SW postcodes before approving the profile.
Profiles are removed if credentials lapse or credible concerns are raised.
See the full verification process — Gas Safe, insurance, identity and service area checks →.
No middleman fees — every lead goes directly to the engineer.
We limit listings per borough so every engineer gets fair, equal visibility.
Frequently asked questions — Boiler Repair Wandsworth
Yes. Under the Gas Safety (Installation and Use) Regulations 1998, gas work must be done competently — and anyone carrying out gas work as a business or contractor must be Gas Safe registered.² For boiler repair, use a Gas Safe registered engineer. Ask to see the engineer’s Gas Safe ID card before work begins and check the back of the card for the specific gas work categories they are qualified for. You can verify registration at [gassaferegister.co.uk](https://www.gassaferegister.co.uk/find-an-engineer/).⁴
That depends where you live. If your property has an individual boiler and you live in Battersea, Wandsworth town or Earlsfield, call PH Jones on 033 3004 2333 or 080 0023 4069. In Putney, Roehampton or Tooting, call T. Brown on 080 0977 8472 or 020 8786 1244. If you’re in a council block with centralised heating, call Smith & Byford on 020 8722 3431 or 080 8196 1791.⁷
Out of hours, or if you’re not sure which contractor covers your property, call the Joint Control Centre on 020 8871 8999 — 24 hours — or contact your area housing team.⁷ ⁸
Pressure loss is one of the most common boiler faults and is commonly repairable depending on the cause. Typical causes are a leaking radiator valve, a leak in the system somewhere, a failed expansion vessel charge, or a worn filling loop. A Gas Safe engineer can top up the pressure and trace the leak on a single diagnostic visit. Persistent pressure loss on an older boiler (10+ years) with other recurring faults may tip the decision toward replacement — see the Repair or Replace guide.
Contact your landlord by phone and follow up in writing. Wandsworth Council guidance says your landlord should acknowledge the report within 48 hours and aim to fix the boiler within five working days in winter, or longer if parts or replacement are needed.¹⁴
If your landlord does not respond within five working days, or there are unreasonable delays, report the disrepair to Wandsworth Council via the report-a-problem service.¹⁵
Keep copies of every exchange with your landlord — the council will ask to see it before intervening.¹⁵
Yes — it helps. Fault codes vary by manufacturer and often point to a specific component (ignition lockout, pressure sensor, flame failure, low water). Giving the engineer the code, boiler make and model when you call helps them bring the right parts and gives a more accurate price before they attend. The code alone isn’t a full diagnosis — the engineer still needs to confirm the actual cause on site — but it narrows the likely parts list.
Not always. Many Nine Elms and Battersea Power Station developments use centralised district heating rather than individual boilers, with a heat interface unit (HIU) in each flat instead of a conventional boiler. HIU faults are usually handled by the development’s appointed maintenance contractor, not a general boiler repair engineer. Check with your managing agent before booking a private engineer.
Boiler Repair across Wandsworth — areas we cover
- Boiler Repair Tooting
- Boiler Repair Balham
- Boiler Repair Battersea
- Boiler Repair Clapham South
- Boiler Repair Earlsfield
- Boiler Repair Wandsworth town
- Boiler Repair Southfields
- Boiler Repair Putney
- Boiler Repair Furzedown
- Boiler Repair Streatham Park
Related services
Related guides
- London Plumbing Costs Guide
- Should I Repair or Replace My Boiler?
- London Hard Water Guide
- London Landlord Plumbing Compliance Checklist
From a pressure fault in a Tooting Victorian terrace to a scaled-up plate heat exchanger in a Balham conversion flat, a gravity-system fault in a Southfields 1930s semi, or an HIU problem in a Nine Elms new-build — every boiler repair engineer listed here is verified and covering Wandsworth SW postcodes. Gas Safe registration is checked at listing, but status can change — always verify the engineer’s ID card and current Gas Safe entry before work begins.
Contact verified boiler repair engineers in Wandsworth ↑
← Back to all plumbing services in Wandsworth
Last reviewed: May 2026 by Adiel Khan — SFEDI-accredited business advisor with 20+ years experience (South East Enterprise Ltd) and operator of VerifiedPlumbers. LinkedIn ↗
This page is reviewed against guidance published by HSE ↗, Gas Safe Register ↗, National Gas Emergency Service ↗, GOV.UK legislation ↗, Thames Water ↗ and London Borough of Wandsworth ↗. Source links are provided within this page where relevant.
Sources & further reading
¹ National Gas Emergency Service — 0800 111 999 (24/7 gas leak / suspected CO emergency line) ² UK Legislation — Gas Safety (Installation and Use) Regulations 1998 (Regulation 3: competence universal; employees/self-employed must be Gas Safe registered. Regulation 36: landlord gas safety check duties) ³ HSE — Gas safety for home owners (Gas Safe registration; ID card categories for specific gas work) ⁴ Gas Safe Register — Find a registered engineer (verify registration and work categories) ⁵ GOV.UK — Approved Document G, Sanitation, hot water safety and water efficiency (unvented cylinder installation/replacement notifiable; competent person scheme self-certification) ⁶ Thames Water — Hard water classification and postcode checker (limescale on appliances and fittings) ⁷ Wandsworth Council — Request a repair (Joint Control Centre 020 8871 8999 out-of-hours; PH Jones/T. Brown/Smith & Byford contractor split by area; centralised heating) ⁸ Wandsworth Council — Housing contacts (area housing teams; additional PH Jones number for Battersea/Wandsworth/Earlsfield) ⁹ HSE — Gas safety information for landlords (annual gas safety check; landlord duties under Regulation 36) ¹⁰ Wandsworth Council — Your rent and charges (heating and hot water charges for centralised systems) ¹¹ Wandsworth Council — Winstanley and York Road regeneration plan ¹² Wandsworth Council — Alton regeneration news ¹³ HSE — Domestic gas: frequently asked questions (gas-meter safety; do not attempt to turn off gas supply unless competent) ¹⁴ Wandsworth Council — Broken boilers in private rented accommodation (48hr landlord acknowledgment guidance; 5 working days winter expectation; not a statutory deadline) ¹⁵ Wandsworth Council — Report a problem in your property (private tenant disrepair reporting) ¹⁶ NHS — Carbon monoxide poisoning (call 999 for suspected CO poisoning; do not drive to A&E) ¹⁷ HSE — Carbon monoxide awareness FAQ (urgent medical advice from GP or A&E department; six main symptoms)