Vaillant say their boilers are high quality & reliability. They speak with forked tongue! We inherited one of their boilers with an extended 7 year warranty, which expired in September 2025. Since September 2020 we had to call out their engineers on many occasions to fix faults. The last call out was on 19 December 2024 when they replaced a range of items, incuding the diverter valve. 15 months later this valve failed, leading to a massive water leak from the boiler, which then ceased to work. We asked Vaillant for their comments on this failure. We received an arrogant, patronising & dismissive response blaming "water quality and system issues". These problems were never mentioned by the engineers on their visits and the boiler was regulary maintained as per the warranty conditions. And we don't think we have any control over the water quality provided by South West Water! When this boiler finally fails, as it will, we will certainly not buy another Vaillant product.
Claim your business profile now and gain access to all features and respond to customer reviews.
With a proud tradition in the UK, Vaillant are a household name because of exemplary products and service. Vaillant operates with the ultimate aim of delivering greater warmth and comfort to your home.
