Guest Tony Posted August 15, 2020 Report Share Posted August 15, 2020 I had a loft conversion around 5 years ago and I think the builders left an old battery operated alarm under the new flooring. We have heard a beep for a year or so but last night this changed to a ringing sound like an old modem telephone line trying to connect. There was a new mains powered alarm fitted at the same time in the same area. I shall be grateful of anyone can advise whether either of the alarms could cause this before I start pulling up floorboards Thank you. Quote Link to comment Share on other sites More sharing options...
Tom Sutton Posted August 21, 2020 Report Share Posted August 21, 2020 How long is a piece of string I think you will have to investigate to find out. An old domestic smoke alarm could cause the beeping, but for a year i think that would be unlikely and I have no idea about the ringing. Have you checked all cupboards and such for a forgotten smoke detector or co detector. Quote Link to comment Share on other sites More sharing options...
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