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Why no hot water from my Vaillant VCW GB242 E? Heating O.K?

I can use the heating fine , but no hot water when I turn on the hot tap, (note , the temp. control knob is now stuck!).
Model Vaillant VCW242 E.

Gary Williams
October 2007
remove grey panel and u should c a black lever with a red microswitch to the left. when hot water tap is opened lever should move anticlockwise and activate m/switch. if it doesn`t then suspect dhw diaphragm in water section (2 types fitted)both with `ears` but one has hole in the middle.

dpmartin17@aol.com

paul martin
October 2007

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