Worcester 28cdi boiler

[caroline76]

Hi this is my first post on here, however I have found many answers by searching here in the past, but cant find an answer to this...
I have this boiler and last night I got round to bleeding the radiators, as the tops have been cold for a while. But I forgot to turn the central heating off first. I since read that this is not a good thing to do. The poor old boilder started spluttering and squeaking and I had nowt on the pressure scale. I read up a bit more using web forums and it seems I needed to use the lil key under the system and turn the grey tappy thing to get some water in. I repressurised to 1.5, as forums suggested and I ran the boilder for 3 hours okay last night.

This eve Ive gone to bath my boys and the hot water was coming out painfully slowly, and I noticed the pressure was up at 3.7.

In hindsight now Im thinking I shouldnt have bled the rads in the first place and probably should have rung a plumber or something.

Id there anything I can try please to sort this out? I'm game to try most things myself but dont wana do any more damage! My boys need a bath and we're cold. I dont wanna bother a plumber unless I have to, as Im on my own and money is rather tight, hence my stupid diy attempts so far...Thank you if anyone is able to assist. Caroline

 

[danplumb]

3.7 ? you did close your filling loop after repressurising didnt you ?

 

[caroline76]

thank you so much for replying. would you say that's the little grey tap thing next to the big T key?
if so, I did it up so there was no more 'noise', but wondered should it have been turned til it stopped? oh gawd, ive knackered it havent i

looking at the booklet, the filling loop is the big key thing.
i turned it back to where i thought it was when i started... its parallel to the front/back of the boiler

 

[danplumb]

yeah you probably should have turned it till you felt it stop, when you say you have 3.7 is that with your central heating hot or cold, Do you have water coming out the copper pipe going outside behind the boiler ? close the grey tap fully and remove the big key. Drain water out the system from a drain off cock or just keep bleeding till your pressure is back down to between 1-1.5.

 

[caroline76]

I have turned another half turn til its proper stopped now. but water defo wasnt left open, i reckon i put too my in last night, makes best sense.

running 3.7 with no call on boiler water/central heating.

theres no water coming out anywhere that i can see - do you mean actually outside?

im just googling what a drain off cock is... basically am i to try to get some water out of the system, is that the plan? or you said bleed it out - so i could just let the water fizzle out of a radiator?

you must be thinking stupid folk like me should leave stuff like this alone!!! bah!

 

[onecog]

You should turn off the small grey knob and REMOVE the key.
The key is not meant to be left in the boiler.Switch off the boiler and bleed a radiator for a while until the pressure has dropped.

 

[caroline76]

yes i have just literally read about this big key. hmm, the previous plumber left it in when he serviced it, so thats why i assumed leave it in.
ill take that out now.
thank you both for your replies

 

[danplumb]

Yes the pipe that runs through the wall outside then turns back down the wall.

do you have one of them attached to a radiator ?

If not just place a cup under a bleed valve and keep empying untill your back to the correct pressure.

 

[caroline76]

success!
thank you both

i reduced it to 2.5 first, tried it, it worked, so went for it and took it right down

pressure back to 1.3 on boiler, all radiators running nice and hot

when i checked the hot water coming out of the bath tap was still el crappo speed, but that i can live with for tonight

my little boys are both v snug and happy now too