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Plese could anyone send me some past papers as my exam is on 1st of december. Many thanks in advance. Musa ______________________ moderator email address removed, see forum rules

Vaillant VCW GB 242 EH - burner keeps burning with Heating off and DHW Off? DHW works fine, Boiler on with tap opened, off with tap closed, but reignites after a few seconds on low flame with CH switched off. As soon the power is applied to the boiler the CH pump comes on the fan runs and the...