Main combi 30 HE problem

[largerjt]

hi guys, just after a bit of advice

I have the above boiler fitted at home and up until now its been great and trouble free.

so tonight while running the hot water it gets up to temp and then cuts out and then fires back up and gets up to temp and then cuts out and just keeps doing this

any help would be great

Rob

 

[kevplumb]

sludged up plate h/ex

 

[largerjt]

what are the sad faces for? can it be fixed?

 

[kevplumb]

yes it can be cleaned

the rest of your system needs cleaning to if its blocking the plate