I have a Worcester 26cdi _ only when we use the shower the boiler intermittantly has a fault, when the fault occures a slow flashing CH light comes on and the burner does not fire up, by pressing the reset button all seems well untill the next time.

can anyone shed any light to its cause.

Donovan, May 2010

you need to get the burner serviced,with what you say its going to lock out,is this right?if so,the burner unit needs decoked,easy job to do

mm, October 2010