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If you have an urgent plumbing, heating or boiler problem, speak directly with our London team for fast professional support.
Choose the problem that best matches what is happening with your boiler or heating system.
Explore the complete guide to common boiler faults, warning signs and troubleshooting.
Browse boiler guidesUnderstand high boiler pressure, its common causes and the checks you can perform safely.
Check boiler pressureFind possible reasons your property has lost hot water and what you should check first.
Read the guideLearn what banging, whistling, vibrating and gurgling sounds may indicate.
Identify the noiseCheck the common reasons a boiler will not ignite, fires briefly or enters lockout.
Check ignition faultsFind error codes and fault information for major boiler brands used in UK homes.
Find a fault codeClear explanations for common boiler and heating problems experienced by London homeowners.
Our guides can help you understand common symptoms and perform basic checks. Some problems, however, should always be handled by a qualified professional.
Contact a Gas Safe engineer if you suspect a gas fault, unsafe appliance or combustion problem.
Get professional help when your boiler repeatedly locks out, leaks, will not ignite or stops producing heat.
Call an emergency plumber for uncontrolled leaks, burst pipes, overflowing water or serious drainage problems.
A fault code can help identify the type of problem affecting your boiler. Use our complete guide to understand common codes shown by leading UK boiler brands.
Covering major UK boiler brands
Always consult your boiler manual and never remove the appliance casing yourself.
Our Knowledge Centre is designed to help homeowners understand plumbing and heating problems before deciding what to do next. The guidance reflects the faults and questions our team regularly encounters in London properties.
Boiler and gas work is carried out by appropriately qualified Gas Safe registered engineers.
Our advice reflects real plumbing, boiler and heating problems found in homes across London.
Straightforward explanations help you understand the problem without unnecessary technical language.
Local knowledge of properties throughout West, South West and Central London.
Answers to common questions about using our plumbing, boiler and heating guides safely.
Speak with the Keystone London team and explain the problem you are experiencing.
Call 02033 699 999Begin with the symptom you have noticed, such as no hot water, low or high boiler pressure, unusual noises, cold radiators or ignition failure. The relevant guide explains common causes and sensible next steps.
You can perform basic user checks described in the relevant guide, such as checking boiler pressure, thermostat settings or whether the property has power. Never remove the boiler casing or attempt to repair gas or internal components yourself.
Yes. Low pressure, ignition problems, system lockouts, controls and internal component faults can affect both heating and hot water. Check whether the boiler is displaying a fault or error code.
Switch the heating off if it is safe to do so, protect the surrounding area from water and arrange an inspection. Do not remove the boiler casing. Read our boiler leaking guide for further information.
If it is safe, isolate the affected water supply and move belongings away from the leak. For uncontrolled water, burst pipes or overflowing fixtures, contact an emergency plumber as soon as possible.
Call a Gas Safe engineer when a boiler repeatedly locks out, will not ignite, leaks, displays a persistent fault code or requires access to internal components. Suspected gas or combustion problems require urgent professional attention.
Keystone London serves homes and businesses across West, South West and Central London, including Chelsea, Fulham, Kensington, Hammersmith, Putney, Battersea, Wandsworth, Westminster and surrounding areas.
