https://www.google.co.uk/search?q=v..._AUIEigC&biw=360&bih=574#imgrc=oICuqQm1KuEsfM:
If that works...its the same as our boiler. The hot waters turned on but wont heat unless we flick up the bottom right knob to the flame symbol.
Yes.....please suggest someone near me Mr vaillant man !
Can't help you further with a local engineer, but these were good boilers and fairly easy to work on. Your fault could simply be lack of servicing. But needs a registered gas man.
Would love to know how @Agile has further modified his one of these to give pre heat operation top of a 10:1 turndown ratio. But I doubt we'll get anymore sense out of him on this thread.
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