Central Heating issue - WWYD?

[Lennybythewood]

So it seems I have an issue with my central heating. There's been a bit of a rattle from the pipes for the last couple of weeks and today I noticed a watermark on my kitchen ceiling - not wet to touch but definitely a watermark. The heating does still seem to be working ok though.

Obviously, I'm going to call someone out to have a look at it tomorrow, but in the meantime should I leave it off completely bearing in mind it's below freezing outside? Thinking more from the perspective of the potential for frozen pipes than anything else.

Thanks again, at least if I manage to get a plumber out tomorrow to look at the heating, I can have them look into that at the same time.

Just as a quick update to this - plumber has been this afternoon and it turns out the issue was as simple as a massive airlock

He's 100% convinced the water mark is unrelated and someone will have to come back tomorrow to investigate the pipework under the bath.

Good news Lenny!