my worcester 24cdi makes a very large noise for 10 seconds after turning hot water tap off,central heating works fine and pleanty of hot water at tap,just fitted a new d/valve diaphragm noise arrived after doing this job , any ideas welcome.dave
Check the pin is retracting immediatly after you turn off the hot tap - sounds like it may be sticking and the burner continues to fire even though the taps now turned off.
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