my comb-boile

[Palmo]

I have an biasi garde comb-boiler it works fine until two days ago it stop running a constact hot water instead it runs a minute of hot a minute of cold ....
I bleed to reduce the bar and tried all I knew still it does not help .

please who has an idea on how to bring back the hot water the heating system is not a problem , that works fine .

 

[Agile]

It sounds as if the plate heat exchanger may be blocked!

Tony