Vaillant Boilers: ecoTEC Range and Common Faults
Vaillant's ecoTEC range is one of the most common combi and system boilers we find already installed in local homes.
Vaillant's ecoTEC range is one of the most common combi and system boilers we find already installed in local homes. We are Gas Safe registered and work on Vaillant appliances as part of general servicing and repair, without holding a manufacturer accreditation with them.
How the range is built
The ecoTEC Plus and Pro ranges use a stainless steel heat exchanger and a fairly dense electronics package, which makes fault diagnosis reliant on the boiler's own display codes more than most brands.
What we see go wrong
Fault code F.75 relating to the water pressure sensor or pump is one of the more frequent callouts, alongside PCB failures on units that have run for a decade or more.
Servicing and parts
Parts are widely stocked given how common the range is, though sourcing specific PCBs for older ecoTEC models can add a day or two to a repair.
Questions we get asked
Are you a Vaillant approved installer?
No — our only manufacturer accreditation is with Worcester Bosch. We service, repair and can install Vaillant boilers as Gas Safe registered engineers working on most makes.
What does an F.75 fault usually mean?
Most often a pressure sensor reading incorrectly or a pump struggling to build pressure, though we confirm on site rather than guessing from the code alone.
Can you still get parts for an ecoTEC boiler?
Generally yes for the mainstream models; older or discontinued variants sometimes need us to source from a specialist parts supplier.