From routine annual servicing to diagnosing unexpected faults, our Gas Safe registered engineers help keep London's boilers safe, maintained and working reliably.
Routine safety and operational checks, component inspection and maintenance to identify developing problems and help keep your boiler in good condition.
Explore boiler care plansProfessional diagnosis of pressure loss, leaks, ignition faults and heating or hot water problems, with clear recommendations before repairs begin.
Emergency boiler repairs
A professional boiler service checks the safety, condition and operation of your appliance. Keystone London's Gas Safe registered engineers carry out the checks appropriate to your boiler, helping identify developing faults and keep your heating system properly maintained.
Inspection of safety devices, the flue system, signs of leaks or damage, and combustion checks where applicable.
Checks of boiler pressure, controls, operating condition and relevant components to assess how the appliance is functioning.
Inspection for corrosion, wear or build-up, with cleaning of relevant components where required by the servicing procedure.
An explanation of any issues identified, including developing faults or components that may need further attention.
Annual boiler servicing is generally recommended, although your manufacturer's instructions and warranty conditions should guide the schedule.
Keystone London provides professional fault diagnosis and repairs for domestic gas boilers across West, South West and Central London. From pressure loss and leaks to ignition failures and unexpected breakdowns, our Gas Safe registered engineers investigate the underlying cause and recommend the appropriate repair.
A boiler that repeatedly loses pressure may have a system leak, faulty pressure relief valve or expansion vessel problem. Our engineers can diagnose the cause and advise on repairs.
Boiler losing pressure guideLeaks can develop around pipe connections, valves, seals or internal boiler components. Professional inspection helps identify the source and necessary repair.
What to check if your boiler leaksIf your boiler fails to ignite, locks out or repeatedly needs resetting, the fault may involve ignition components, sensors, controls or the gas supply.
Why your boiler won't igniteA boiler producing no heating or hot water may have a circulation, diverter valve, pressure, thermostat or other component fault requiring investigation.
Help with no hot water in LondonBoiler fault codes can point towards pressure, ignition, overheating or component problems. Accurate diagnosis is needed before deciding on a repair.
Find your boiler error codeBanging, whistling, vibrating or gurgling can indicate trapped air, restricted circulation or other heating system problems that need checking.
Common causes of boiler noisesIf breakdowns are frequent or replacement parts are difficult to source, it may be worth comparing the cost of repair with a new boiler.
From annual boiler servicing to diagnosing unexpected faults, Keystone London supports homeowners, landlords and property managers across West, South West and Central London.
Boiler servicing and gas-related work carried out by appropriately qualified engineers.
We investigate boiler faults and explain the findings before recommending further work.
Professional boiler care for private homes, rental properties and managed buildings.
Keystone London provides professional boiler servicing and repairs across West, South West and Central London. Explore our local service pages to find support in your area.
We also cover surrounding London areas. Contact us to confirm availability at your address.
Check your areaAnswers to common questions about boiler servicing, fault diagnosis and repairs in London.
Our team can help you choose the appropriate service or discuss a problem with your heating.
Contact Keystone London