Vokeraoption combination boiler

[Neil Harvey]

My vokera option boiler is letting water out of the overflow,it takes about 1hour for the yellow and red lights to come on . When I top it up they go out ok and the boiler runs fine, could it be the pressure relief valve?
Anyone have any ideas?

 

[ianmcd]

Possibly yes but if you lower the bottom facia, inside there on the R/H side you will see the pressure guage (crap design I know) set it at 1.5 Bar with the system cold, run the CH for about 20 mins or so and see if the pressure increases to near 3 Bar if it does, your expansion vessel needs re-charging or replaced

 

[Neil Harvey]

Thanks have got it at 1.5 heatings on now let's see

 

[Neil Harvey]

Well lan heating on now for 30mins and still at 1-5 bar (1mark under )and still dripping out of overflow,so does it look like pressure relief valve?

 

[ianmcd]

Well lan heating on now for 30mins and still at 1-5 bar (1mark under )and still dripping out of overflow,so does it look like pressure relief valve?

yes it does they are easy to change but dont ever use that valve to drain or release pressure from the boiler, us a drain point, if you get dirt on the seating of the valve it will drip, you can usually get away with splitting and cleaning the valve but it is a safety device so unless you know what you are doing just replace it, they are not expensive

 

[Neil Harvey]

Thanks for the advice will order it (£7) tonight.

 

[ianmcd]

If you are replacing it just drain the boiler using the old one , but dont use the new one to drain it or release pressure