Just had a message left on the answerphone from a customer saying she has no hot water on her vaillant Eco-max 828 combi & F.19 fault code showing.
Having had a quick look at the MI & googling F.19 I can't find anything on that fault code.
Has anyone come across this fault code before & can give me any clues please.
Please PM if info is gas sensitive. Many thanks. Martin
Having had a quick look at the MI & googling F.19 I can't find anything on that fault code.
Has anyone come across this fault code before & can give me any clues please.
Please PM if info is gas sensitive. Many thanks. Martin