Had this installed a couple of weeks ago and still getting used to it so this may be a stupid question. Sometimes it will switch from central heating to hot water when I'm not running any water from anywhere with accompanying clunking sounds like a tap has been turned on (and I live on my own so it's not someone else!) Is this normal or does it mean that a tap in the flat above me or below me could be connected to my system? (the plumbing and electrics are a bit haphazard in my building so this isn't completely out of the question!!)
Thank for any help!
Thank for any help!