Hi all
Once again another problem with our SD30e combi boiler.
Brief history of the problem :-
4wks ago noticed boiler pressure very low so topped up CH system with filling loop, but like an idiot the system was warm when l did it, which l know is a no no.
PRV started leaking, so let out some pressure from a rad. After a couple of days of this constant problem l realised that the filling loop had not turned off properly in the first place due to plastic lever being cracked and not turning fully off. ( I know the filling loop should not be always connected but it has been ever since installation 9yrs ago with no problems until now. )
Sorted filling loop problem out and fitted new PRV.
Problem now is system looses pressure,- top it up to 1bar and when CH is on the pressure goes up to 3bar and PRV opens again letting out water and hence pressure goes down and tripping out the boiler .
Did a search on this forum and decided to check pressure in expansion vessel which was zero, so following instructions on here l repressurized the EV, and put 10psi in it as recommended.
But to no avail, the pressure still keeps going up and down when CH on. No pressure loss etc ,when system not on.
Could there be another well known problem ?
Any help greatly appreciated.
Once again another problem with our SD30e combi boiler.
Brief history of the problem :-
4wks ago noticed boiler pressure very low so topped up CH system with filling loop, but like an idiot the system was warm when l did it, which l know is a no no.
PRV started leaking, so let out some pressure from a rad. After a couple of days of this constant problem l realised that the filling loop had not turned off properly in the first place due to plastic lever being cracked and not turning fully off. ( I know the filling loop should not be always connected but it has been ever since installation 9yrs ago with no problems until now. )
Sorted filling loop problem out and fitted new PRV.
Problem now is system looses pressure,- top it up to 1bar and when CH is on the pressure goes up to 3bar and PRV opens again letting out water and hence pressure goes down and tripping out the boiler .
Did a search on this forum and decided to check pressure in expansion vessel which was zero, so following instructions on here l repressurized the EV, and put 10psi in it as recommended.
But to no avail, the pressure still keeps going up and down when CH on. No pressure loss etc ,when system not on.
Could there be another well known problem ?
Any help greatly appreciated.