Worcester Boiler zero pressure when cold

[MrShed]

Hi all,

Just a really quick one, trying to decide whether I need an engineer out or not.

The pressure on my worcester boiler is showing as rock bottom zero when cold and just under 1 bar when hot - I noticed this as the boiler needed resetting. But otherwise is operating perfectly fine.

I have tried topping it up when cold but the needle doesnt appear to move at all, and I'm a little reluctant to top it up for too long in case I over pressurise it as I feel like the pressure reading is wrong rahter than it genuinely being low pressure - I'm assuming if it was genuinely low pressure the boiler just wouldnt work!

Questions:

1) How long should I leave the top up valve open for - I have tried it for a few seconds and no change, but this was all I needed in the past on different Worcester boilers to show a change.
2) Does this sound like a shot pressure gauge, or actually just low pressure, or something else (like pressure vessel)?

Thanks!

 

[Agile]

Probably a combination of depressurized expansion vessel and a restricted bundy tube to the pressure gauge.

Perhaps also something wrong with the filling loop as well.

Tony

 

[MrShed]

Tony thanks for the quick reply. Sounds like an engineer visit then as that would be beyond my abilities!