"Chris Hogg" wrote in message
...
On 8 Sep 2019 11:20:52 GMT, David wrote:

Every few days (I think) one or both of the mains smoke alarms cheep once.

On line search suggests that low battery should cause a regular cheep
(already experienced that and changed the battery).

There is also a suggestion that dust could cause a false alarm - but this
isn't an alarm, just a single cheep.

Has anyone else experienced this, and worked out what was causing it?

The alarms have been fitted for about 5 years.

Oh, and does everyone change their smoke alarms every 10 years?

Cheers

It's not just to indicate that the alarm is working, is it,

and keep the user awake all night

great feature (not!)

tim