Noisy Ariston Boiler

[sk10]

I have an ariston combination boiler (23MFFI) that has started to make a loud
screaming sound when you turn on the hot water. Central heating is
fine and the actual delivery of hot water is ok. Just the sound is so
loud and continuous. The boiler has been installed for over 5 years without problems. This symptom started all of a sudden. Any ideas would me appreciated.
Thanks

 

[numpty1]

probably the divertor screeching time to spend the cash

 

[sk10]

probably the divertor screeching time to spend the cash

What does that mean??
Do you mean the divertor valve is sticking and making that noise? Would this give a continuous sound? Would the hot water still work ok?
Cheers

 

[bengasman]

Screeching sound is normally fan or pump. Does not make a lot of sense as the speed of those is constant on your boiler.

 

[kevplumb]

baxi had the same prob airc o rings in the diverter