Recently it's been going beep every now and again. The alarm whistles and the strobe light in the bedroom flashes (last owners were deaf). This only happens when I am standing in the bedroom doorway and it's been scaring the hell out of me. It first did it on Friday and has done it a few more times since then, frightening me each time.
It did it just now as I went to sort some washing. I step off the top step and step outside the bedroom doorway and the alarm hiccups. I stepped back into the same place (from inside the bedroom) and it did it again. I then bounced up and down in that spot and it did it lots more.
I think there must be a loose connection under the floor there where the wire comes up the stairs and across the threshold to run up the bedroom wall. It's reassured me slightly cos now I know it shouldn't wake me up in the middle of the night (just the cats doing that then) and it should be fixable.
"Contact letting agents about alarm" - added to To-Do list.