Boiler lost all pressure when I was bleeding a radiator

spaceboy

Last night I noticed the bathroom radiator was cold half way up - it's quite a tall radiator. So I started bleeding it and after a while I noticed less and less air was coming out until it stopped completely with no water coming out. The radiator was now only cold in the top quarter.
So I went down to look at the boiler and the pressure guage was at 0 and it was making an odd noise so I turned it off.
I'm still getting hot water out the taps.
It was a newly fitted Worcester boiler less than a year ago.
How do I repressurise the system?

worried_jim

It will be quick and simple to do with instructions in your boiler manual. Once done bleed all of your radiators again and then top up the pressure.

neilmcl

spaceboy wrote: »

Last night I noticed the bathroom radiator was cold half way up - it's quite a tall radiator. So I started bleeding it and after a while I noticed less and less air was coming out until it stopped completely with no water coming out. The radiator was now only cold in the top quarter.
So I went down to look at the boiler and the pressure guage was at 0 and it was making an odd noise so I turned it off.
I'm still getting hot water out the taps.
It was a newly fitted Worcester boiler less than a year ago.
How do I repressurise the system?

You need to re-pressurise the system via the filing loop. Instructions for your particular model should be in the operating manual. You need to slide out the bottom tray and depending on your model you may either have a plastic key to use or look for a blue switch underneath.

What model is it?

spaceboy

neilmcl wrote: »

You need to re-pressurise the system via the filing loop. Instructions for your particular model should be in the operating manual. You need to slide out the bottom tray and depending on your model you may either have a plastic key to use or look for a blue switch underneath.

What model is it?

It's the Greenstar 30i ErP Condensing Combi Boiler

coffeehound

spaceboy wrote: »

It's the Greenstar 30i ErP Condensing Combi Boiler

Have you got the manual for it?

neilmcl

spaceboy wrote: »

It's the Greenstar 30i ErP Condensing Combi Boiler

You particular model has been discussed before - https://forums.moneysavingexpert.com/discussion/6053204/boiler-pressure-issue&highlight=greenstar

spaceboy

https://ibb.co/k9CTjRS

https://ibb.co/x24D9np

The links show two photos of the pipework under the boiler

[Deleted User]

Hi,


here's the photies,

molerat

The two taps on the silver flexi pipe are what you need. With the boiler turned off gradually open one of them to fully open then open the other one slowly and watch the pressure gauge rise. When in the green area shut them both off. Go round and bleed all the radiators, if you have a lot of air in one then there is a fair chance there is more in the system. When done go back and check boiler pressure and top up if necessary. Turn boiler back on. If the system has not been bled and topped up since installation then that is likely why you had the air in the system and hopefully will not need doing again for a while.

neilmcl

As above, the silver flexi pipe is the filling loop so you need to open the cold water feed tap first, the one on the left I believe, then the right one to pressure the system. when done turn them both off.

spaceboy

Done. Thanks guys.