Guide :Home Security : Nighthawk Combo Gas/co Detector
Alarm keeps beeping, reads 0
Our alarm (900-0113) has sounded briefly (3 short beeps) 3 different times today. The display continues to read "0", nothing else. I changed the battery thinking that was the problem, but it happened again since then. I am thinking that it is malfunctioning since it still reads 0 after testing it. There is a blinking red light next to the 0 which, according, to the manual, means it is working. I have two small children at home so do not want to misdiagnose. Thanks.