vaillant gb 242 eh - what should water level be? please help?

It looks like the boiler is needing some TLC courtesty of a trusted gas man, if there's such a thing....
I suspect there is a fair bit of limescale and other deposits inside the boiler, and it just can't disperse its heat quickly enough due to this. I can't really recommend anything for you to try now, unfortunately but I don't think your system is dangerous. It does need a professional opinion though, and get them to write down what they think the problem is...there's just too much bullsh1t flying about in this trade.

John
November 2009

Hi John

I have left the water pressure now.The ch and hw comes on.Then I hear a clicking sound and it looks as if the light is out and its trying to ignite.The light comes on signalling the pilot light is out and then it wont ignite for ages.This is an intermittent fault.

lulubomb
November 2009

The boiler pressure is fine now, no need to touch it further. Make sure all radiators are turned fully on. I'm not sure what you mean that the boiler sounds like its trying to ignite because surely it has lit up now...
There may be pump issues if its making strange noises!

John
November 2009

Hi John
Thx for replying so quickly.the white one is 2 and the red one is 1.5 .i just let some water in earlier and the white one went up from below the red one to 2.the heating has now come on.but it is periodically sounding like its trying to ignite?!!!is this right? sorry - i am totally lost!!!!

thx
lulubomb

lulubomb
November 2009

One of the hands will be movable by you - turning the gauge dial itself. The boiler gauge should read about 1.5 bar. Set the gauge to this, so you can see if the pressure varies.

John
November 2009