Recent content by Joost Dantuma

Thanks Dan. Don't know what info you need: 3 floor London terraced house. 14 radiators (from memory) (Including bathroom & shower room towel racks). Sounds like it is needing a purge then ("sludge"), and that £900 is not crazy.

Hi, We have an intermittent but common fault on our 7 year old ecoTEC838 Vaillant boiler. When running hot water, the water temperature will suddenly spike to an auto-safety shutoff point (over 80 degrees). We get "overrun" errors "water Deficiency" errors. (Specific errors: F20 "Temp...