Urgent boiler help

[RockCrushesLizard]

Tonight I attempted to bleed a radiator, and repressurise the system.
The radiator went fine, but the pressure is now zero and I can't get it back up.

I have a combi exactly like the one in this video,
www.corgihomeplan.co.uk/help-and-advice/advice/re-pressurising-your-boiler
and was doing what it said. The only difference is that on mine, the square know would only turn clockwise, not anti clockwise.
When I do this, I can hear and see the water draing out of the copper pip that sits in front of the White plastic pipe in this picture, which I assume is some sort of overflow.
I've now turned everything off, because suspicious noises were happening, and it didn't seem happy.

What do I need to do to avoid us all freezing tonight? I may never attempt radiator maintenance again!

Are there plastic taps on the bottom side of the boiler?

Did you let water out of the radiator when you bled it - this lowers the pressure in the boiler.

im not sure about the little copper pipe though. I think it's the drain point where you would drain the whole system from. Have you turned something that has drained the system rather than filling it up?

You need @Pigletjohn

I think I have managed to drain something, though I don't know why - I could see the water flowing out. I Don't know why it isn't filling up.

Have you tried the pressure valve?

Sounds like you're draining the system rather than re-filling it. Find a manual either online or at home and double check or it'll be a chilly night.

I've got the manual, both the service engineers ones and the homeowner one. The homeowner one only covers repressu rising that I thought I was doing, and the engineers one doesn't explain it - it just says close valve, fill etc.
I have found the pressure valve though, and it has a lever on it which happily turned 45degrees and clicked. (System is all off, so not going to kill it!)
I thought maybe, the pressure has going over, activated the pressure valve, and i have now closed it manually? (I haven't gone further than that, and can put it back how it was!)

If the pressure was going up the bars on the dial would rise not drop.

It yes if you overfill it drains out the overflow.

Maybe a picture of the pressure dial would help as well and a close up of the taps underneath.

Yes, I wonder if I've blown the valve when I was attempting it earlier though...

But you'd know as the dial would have shot to the top on filling first surely?

Excuse my typos in my previous post btw.

I'm wondering if I've left the tap turned all the way on rather than all the way off after the initial bleeding, so didn't see it happen, if that makes sense...

If you google your exact model there maybe a video on how to add water to the system. It's well worth a google.

Can I see a pic of the dial and where the it is?

Have you looked for tutorials etc on youtube? They are brilliantly helpful, even if there's a problem you can't fix, you can speak knowledgeably to a plumber.

X posts!

Typing on phone, takes forever!

OP. The front of your boiler at the bottom is hinged and will pull towards you.
Inside you will either have a key already in or, you will have a hole for a plastic key.
You need to turn it, if I remember correctly, a quarter turn for the water to fill your boiler. Keep an eye on the pressure, you do not want to go over 1.5 bar.

Hope this helps.

if the thing you were turning was this (I can see it in the photo) it is the drain cock, not the filler.

Take some more photos please. I can't see the filling loop. It is often a braided, flexible metal hose with a valve at each end.

Mumsnet completely died on me there! Thank you for the advice to about the PRV, and to check you tube DoomGloom, and Momeraths - I found a great tutorial, had a fiddle with the PRV and managed to get the system all sorted. It may not last, but it worked this time, so we'll be cosy tonight!

Thanks Zombie, also, but I didn't manage to log on until I'd finished - I appreciate the effort.

oh, it looks like Zombie has given you the answer already.

XP piglet john:
I now know I was using the correct filling mechanism, it was just draining straight through the PRV.
I'm usually fairly practical believe it or not! New house, different boiler, and freezing temperatures are not the time to experiment

Yay! Glad it's sorted

Me too - thank you all