How long is the Vaillant warranty?
No single term: 2 yr (ecoTEC pro, ecoFIT pure) or 5 yr (ecoTEC plus); up to 10 yr; register within 30 days (UK).
This is a typical figure, not a guarantee — the term can vary by product line and by country (UK and US terms for the same brand often differ). Always check the paperwork that came with your specific appliance.
Register your Vaillant appliance for free
Registering is usually free and can extend your coverage or unlock parts warranties. It takes a couple of minutes on Vaillant's own site: