1st off - great forum, thanks.
I have 3 of these in my house, 1 on each floor of my 7.5 year old house..
The top floor unit started chirping about 2 days ago.
Today I replaced all batteries with Duracell (wow I did not know they were that expensive!).
The chirping did not stop.
I then disconnected the mains, pulled all covers off, vacuumed them and replaced.
Chirping did not stop.
I then set the alarm off using toast...(!). then wafted a tea towel until the alarm stopped.
Chirping did not stop.
15 minutes later there was a double chirp from each sensor (reset).
Chirping did not stop.
I disconnected the mains (green light off).
Chirping did not stop.
I then swapped them all round i.e. top floor to middle floor, middle to bottom, bottom to top.
Chirping did not stop.
It's driving me mad and I have not slept...
I want to take a hammer to the whole system except for the fact that I have 2 small children.
Any guidance gratefully accepted.
Alex
