Ummm keep it easily accessible. Check my post at top of page. I needed access to my sewer as I had a little furry decker problem. It looks like a simple fix. What you can't see is the £3000 oak floor I had to chop to access it.
Nowt like hindsight.
Long story short, I have an old soak away connection in a manhole in my extension. It was not capped n the extension was done and now rats have used it to nest :evil:
The other unused openings have green plugs in them, where can I get one to cover the unwanted opening?
I think you'll find it's actually the radiator flexing a little as the valve shuts, hence no change with 2 different rads. Annoying but not a fault as such. You could try moving the valve to the opposite end of the rad and see if that helps matters.
:D
Pleased to hear its sorted and you're happy. Sounds like you gave the engineer biscuits as well as coffee if he did more than just the single fault.
Like we have said, leave it.
We've got nothing to gain by telling you to get someone in. The combustion cover (death box) on that is easy to get wrong if you aren't aware, seen it wrong plenty of times.
The flue (death tube) is something you do not want to mess with at all.
It wont...