Water leaking from overflow

[IanW83]

Hello,

We have a Vaillant boiler (Model VUW242E) which keeps losing pressure. In roughly 10 hours it goes from 1 Bar to 0. During this time the water is leaking from the overflow letting air into the system. It only recently started doing this and I would like to try and fix it myself. Would anyone have any idea what has failed to cause this problem?

 

[picasso]

if you look at FAQ,S at the top of the main page, I think first on the list is repressurising expansion vessel, have a read and repost if you get stuck.

 

[IanW83]

Will do, thank you.


Edit: Actually, that is just literally repressuring it? I can do that, but the pressure always drops within half a day. I'm looking to cure it completely.

 

[picasso]

did you read the faq ?

 

[IanW83]

Sorry no i hadn't, just the first line and jumped to a conclusion . I'm always telling people off at work for that too.. But its my week off, feeling a bit lazy .

 

[picasso]

no problem, have a look and see if you fancy having a go.

 

[IanW83]

Seems its the expansion vessle, which will need replaced with a new one? Its not a servicable item?

 

[picasso]

read the faq, its all there......in colour and everything, how to repressurise, how to tell if its knackered, go on you know you want to.

 

[IanW83]

Must have missed that part, ill go over it again. Thanks.

 

[IanW83]

I've taken the front off my boiler, however, I cannot find the PV, could it be extneral somewhere else within the CH system?

 

[IanW83]

Found it

Its behind my boiler.... doh