i'm restoring old Lelit PL041 as my second coffee-maker and have found that 3-way valve let water leak from the boiler while heating. Also the steam seems to be to weak as for this decent boiler, probably because of insufficient pressure caused by that valve. It looks like here
When you stop brewing the valve does its usual job spitting water to tray so I guess it is not hopeless.
What do you think, could the series of backflushing restore the valve to normal functioning or I'd better take the valve to pieces and try to fix it?
Thank you! Hopefully I explained all clear enough