Ariston Combi 23 MFFI boiler increase pressure and water leaking problem?
My Ariston Combi 23 MFFi boiler pressure cage is constantly increasing to the Max and water trickling through the drain pipe at the back of the pump. What is wrong and how do I fix it?
This may be due to the valve on the filling loop letting by. although at 3 bar the pressure relief valve should discharge the excess pressure. If the PRV is blocked this could lead to water escaping from an internal weak joint.
