accumulation of dust. Try replacing the unit



"Jacque Asse" wrote in message
news:Z_4mi.3629$7R4.3563@trndny09...
With a battery-operated alarm located in a central hallway on 2nd floor of
a townhouse. Alarm goes off with no apparent reason (no fire, no smoke
source, no heat source). Alarm stayed on steady for few minutes but then
shut off. Any suggestions as to what may cause this apparent false alarm?