I've tried turning the valves located underneath the boiler, but I'm having no success. I can't hear anything, as if there is no water running into the boiler.

I've requested a call-out, but they've said I need to wait for 3 days.
Was hoping someone would be able to help before then; as I have a pregnant partner in a cold flat.

Help would be appreciated.

D, March 2017

I sympathise - but it's a good video notwithstanding...

You say that you're not having any success - is that because you're unable to find or operate the valves - or - is it that when you do operate the valves the pressure in the system doesn't increase as it should?

Good Luck..., March 2017

I fail to see how replies like this lend any assistance whatsoever. The sarcasm is most distasteful.

as I stated, I've already attempted this.
'I've tried turning the valves located underneath the boiler, but I'm having no success'.

I appreciate the help, nonetheless.
I would also add that I have been googling for answers both before and after adding this; to pressume otherwise is rather ignorant.

D, March 2017

There are people contributing to this board who say that people who have not tried searching for themselves should be ignored.

I disagree and am pleased to provide the result below BUT I will happily point out that within 30 seconds of starting a Google search for "f22 error Vaillant Ecotec" I found results like this:

https://www.youtube.com/watch?v=iApHxkj4cOA

You may like to search some more for yourself.

XXX, March 2017