Vaillant boiler repair and servicing in London

Vaillant boilers

Vaillant is a German manufacturer with a long UK presence, and its ecoTEC range turns up constantly in London flats and converted properties — partly because the units are compact enough for the cupboard installations that conversions force. Of every boiler brand, this is the one people in London search for by name most often, which usually means they already have one and want someone who knows it.

What we see on Vaillant boilers

• Expansion vessel failures presenting as pressure that will not hold
• Ignition and flame-sensing faults on higher-hour ecoTEC units
• Compact installations in cupboards where servicing access is tight

These are the patterns we see across the installed base, not a diagnosis of your boiler. Faults are identified on site before anything is quoted.

Vaillant questions

My Vaillant keeps losing pressure. Is that the boiler or the system?

Either, and it is worth knowing which before spending. A leak on the pipework or radiators loses water you can sometimes find; a failed expansion vessel loses pressure with nothing visible anywhere. The vessel is a common failure at this age of unit and is a repair rather than a replacement.

Do you repair and service Vaillant boilers?

Yes. Gas work is carried out by Gas Safe registered engineers, which is the legal requirement for working on any gas boiler regardless of make.