Ferrolli MODENA, 30C, HW flow rate poor.

[Ted808]

Oldish combi, servicing minimum, HW flow rate has decreased, check filter on incomin cold, not much in there, a tiny spec of dirt. I'm thinking heat exchanger scaled up. So, custard wants new boiler for peace of mind. What can I do to ensure that new boiler doesn't have the same issue? Flow rate at incoming mains is good, pressure ok. Or am I just being paranoid?

 

[Scott_D]

Limescale fighter or water softener

 

[sammathias]

You checked the flow restrictor isn't nakered?

 

[sammathias]

Filling loop??? Disconnect and check flow rate closest to boiler..