Boiler repair London
No heating or hot water? Tell us about the fault. We will confirm the scope and next step before booking.
What we do
Tell us about the job so we can check the scope and the next step.
- Tell us the boiler make and what is happening
- Include a photo or fault code if available
- We will review the scope before confirming a visit
Boiler repair in London
Tell us whether you have no heating, no hot water, a leak or a fault code. We will review the information and confirm whether the work can be arranged. Registered subcontractors carry out and sign off gas work under their own registration. Any gas paperwork is issued in their company name.
Describe the fault before anyone attends
A boiler that loses pressure, repeatedly locks out or heats the radiators but not the taps can have different underlying faults. Note when the trouble began, whether it is intermittent, and which parts of the home still have heat or hot water. If a fault code appears, record it rather than repeatedly resetting the boiler. SJW uses these details to assess whether a suitable registered subcontractor can investigate any gas-related work.
A photograph of the display, the boiler make and model, and any visible water around the unit can help narrow the first assessment. Tell us about previous repairs or recent changes to the heating system, too. We cannot diagnose a component from a code or photograph alone: the registered subcontractor carrying out gas work will need to inspect and test the appliance under their own registration before advising on a repair.
Keep the situation safe
If you smell gas, suspect a carbon monoxide problem or have an alarm sounding, leave the area, avoid using switches or flames, and follow the National Gas Emergency Service's advice on 0800 111 999. Do not remove the boiler casing or try to repair gas components yourself. SJW can discuss arranging a registered subcontractor for gas work only after the immediate danger has been addressed.
For a visible water leak, avoid wet electrical fittings and use an accessible isolation valve only if it is safe to do so. Tell us if the leak is reaching another flat or damaging a ceiling; that can affect the first practical step. A loss of heating can also come from controls, circulation or the wider system, so the visit's scope should be agreed rather than assuming every symptom calls for work inside the boiler.
Assessment, diagnosis and repair choices
We review the symptoms and location, then check specialist cover and propose an assessment if the enquiry is suitable. A registered subcontractor carries out and signs off any gas work under their own registration and company name. Their findings determine whether a repair is possible, whether parts must be identified or sourced, and whether a separate visit is needed; no repair outcome is promised from the initial enquiry.
Ask for the fault found, the proposed remedy and any remaining limitations before agreeing further work. An older or repeatedly failing boiler may warrant a discussion about replacement instead, but that should follow diagnosis rather than be presented as the automatic answer. If other heating-system work is indicated, we can review the findings and quote separately for the next scope.
Quote and follow-up
This is an enquiry and quote service, not a fixed-price boiler repair or a direct online booking. Tell us the postcode, appliance details, symptoms and access constraints; we will confirm what can be arranged, the proposed visit scope and its charge before you agree. A diagnostic visit does not by itself include an unspecified replacement part or guarantee that the fault can be resolved on that visit.
If parts or additional work are required, we can use the registered subcontractor's findings to explain a follow-on quote and any separate attendance. Keep the fault code, photographs and notes of what has already been tried so the next discussion is useful. Gas-work records and any sign-off are the responsibility of the registered subcontractor under their own company name, not a promise of an SJW-issued certificate.
How we assess your enquiry
- Send the details. Describe the issue and include photos where useful.
- We check the scope. We confirm whether a suitable specialist can assess the work.
- Agree the next step. If we can take on the work, we confirm the scope and quote before booking.
No price or visit is confirmed on this page. Please send the details for assessment.
Frequently asked questions
Can you look at my boiler fault?
Send the make, model and fault details. We will confirm whether the work can be arranged before any booking.
Should I keep resetting a boiler that locks out?
Record the code and when it occurs, then contact us for an assessment. Repeated resets can hide a recurring fault; do not open the casing or attempt gas repairs. A registered subcontractor assesses any gas work under their own registration.
What if the boiler is leaking water?
Keep clear of wet electrics and tell us where the leak appears and whether it can be safely isolated. Send a photograph if practical. We will assess whether plumbing attention or a registered subcontractor for gas-appliance work is the appropriate next step.
Will the first visit include the repair?
Not necessarily. The fault may need testing, a part or another specialist. We confirm the assessment charge and scope first, then explain and quote for any follow-on repair after the findings are known.
Is a fault code enough to quote the repair?
A code is useful context but may point to more than one cause. Send the make, model, code and symptoms; a registered subcontractor must inspect and test before confirming gas-related repair work.
Should I repair or replace an older boiler?
That depends on the diagnosed fault, parts availability and condition of the appliance. We can discuss replacement as a separate quoted option after assessment; registered subcontractors carry out and sign off any gas work in their own company name.
Areas we cover
Tell us what needs attention
Send the job details. We will confirm the scope and suitable specialist availability before any booking.