dripping combi overflow

[keel]

Hi, I have a worcester Bosch 350 combi boiler. It has started to drip from the overflow and thus loses pressure slowly over a few days.(it as only a slow drip). Has anyone got an idea what the problem is? All answers greatfully received.

 

[EdwardCurrent]

Hello Keel,
Have a peek at my post and maybe we can come to some kind of arrangement ????

Hope you find help here.
When my system was losing pressure the bloke fitted a 'new cylinder' thing, sorry not sure about the cost, but it took him a few hours to do.


Regards,

Ed

 

[gigz]

You need a new pressure relief valve. You could try opening it in case theres a bit of crud stuck on the seating.

 

[glasgowgas]

you should fill your combi back up to between 1 & 1.5 bar, do this when the boiler is cold. fire up combi, if pressure rises to 3 bar, you have a problem with your expansion vessel. this would cause p.r.v to lift thus crud could now be under valve seat

 

[bengasman]

Hello Keel,
Have a peek at my post and maybe we can come to some kind of arrangement ????

Hope you find help here.
When my system was losing pressure the bloke fitted a 'new cylinder' thing, sorry not sure about the cost, but it took him a few hours to do.

A few hours?