Worcester 24cdi red insubstantial flashin fast pump running no warmth no hot sea is it a inaccurate pcb? ...
Answers: It is lb157 plus vat for an engineer to come from Worcester Bosch and they will fit up to 3 primary parts, if it is the pcb, it's worth it, if not it may not be, you inevitability to say which red muted is flashing (heating or hot water or burner), is the green night light flashing? and what position are the thermostatic controls at? Then I may be able to point you surrounded by the right direction.
with most hot versions of combi after following the trouble shooter the finish reason seem to be replace PCB , there are deeply of other faults that could come down to like conclusion , try looking for loose connections , on the fan , check the ,nouns flow switch , check , the cover is airtight , check , all , in the past you replace a very expensive PCB merely to realise it was something simple.