Boiler Manufacturers

Boiler Manufacturers Help Centre

Find your boiler brand, common fault codes, and book a Gas Safe engineer across London.

We repair boilers from all major manufacturers across London.

Gas Safe registered engineers for safe diagnosis, repair and testing.

24/7 call handling with London wide booking and fast triage.

Jump to: Popular Brands · How We Diagnose · Repair vs Replace · All Brands

Popular Boiler Brands We Repair

How We Diagnose Faster

Most boiler breakdowns can be triaged quickly if you have the right information. When you call, share:

• Boiler brand and model (for example, Worcester Greenstar, Vaillant ecoTEC, Ideal Logic)
• Fault code (EA, F28, L2, E133, F75, and similar)
• Your postcode (so we can route an engineer locally)
• Whether other gas appliances work (especially for ignition faults)
• Boiler pressure (aim for 1.0 to 1.5 bar)

If your boiler pressure keeps dropping, use our pressure guide.

London and Common System Problems

London homes often have hard water and older heating systems, which can contribute to:

• Sludge and restricted circulation causing overheating and lockouts
• Frozen condensate pipes during cold snaps
• Pressure drops after bleeding radiators or due to small leaks

If radiators are cold at the bottom or you have noisy pipework, a power flush can restore flow. Power flush guide.

Repair or Replace?

If your boiler is 10 to 15 years old and needs a major repair (PCB, fan, heat exchanger), replacement may be more cost effective. If it is a simpler fault (pressure, sensor, ignition component), repair is often the best route.

Read our honest guide: repair or replace and see new boiler installation.

All Boiler Manufacturers

Choose your boiler brand below and jump to fault codes and common fixes: