Boiler has a slight water leak and giving a F.75 error?

iHamza

Basically last week the hot water and heating stopped working all of a sudden and the boiler was giving an F.75 error (we had no idea what it was), there was also some water underneath the boiler. We called a local repairman and apparently the pressure was low which is why there was an error, but he couldn't find where the leak was from so he just assumed it was nothing.
Now today it started happening again, there was also an error but this time I knew what to do, increased the pressure a bit and now it's working but it's still leaking, and I found the source so I took a picture of it.
I have no idea how boilers work or what this part is, but can someone assist me on what to do? I really don't want to call up the local guy again since he took £40 just to increase the pressure (literally a 30 second job). Should I contact British Gas? We don't have insurance or anything with them since we're tenants and our landlord is a bit of a pain, and also isn't in the UK right now so it really isn't worth the hassle to get in contact with him to do something about it.

Can't upload images and can't post links so I can't really show where the leak is coming from =/

Andy_WSM

Don't contact British Gas if you don't have an agreement with them, they will charge you a small fortune!

A local independent is the way to go, but if it's your landlords responsibility, then how can it not be worth pursuing him if you are worried about the cost? A repair is unlikely to be "cheap" if you considered a £40 callout charge expensive! To say "all he did" is unfair. He drove to your house, in his time, in a vehicle he pays for, diagnosed the fault (if not the cause, but if the leak wasn't apparent at the time, how could he find it?) and left you with a working boiler.

ollski

Guessing it's a vaillant boiler?, usually leak is from either the diverter valve or one of the rubber connectors on the flow and return pipes. Bg will charge about 180, think vaillant about 250, independent guy will be dependent on the part required.

macman

Make and model would be helpful...
But why are you paying out for repairs to your landlords' boiler? It's his responsibility to maintain it, not yours.