worcester greenstar boiler

Hi, is there anyone that can help me with my boiler problem please? I have a Worcester Green Star 38 CDI classic boiler with hot water issues. When I turn on the shower the water fluctuates between hot and cold. The temperature goes up to 110 and then it cuts out - there are no error codes. The...

The blue light had been turning off randomly but only once every few months - a simple reset (turn the 'right' dial fully left and then back , fixed the issue previously) today the boiler has sounded more violent, after r reset. sounds like it is boiling water and then after 2-4 minutes it goes...