Hello. Is the alarm giving you one chirp every 30 seconds, 3 long beeps, a pause, 3 long beeps, a pause, or 4 quick beeps, a pause, 4 quick beeps, a pause? If it is one chirp every 30 seconds then this is a fault mode to let you know the diagnostics have been tripped and the alarm is not working properly. Please call us with the alarm in hand at 1-800-880-6788. If the alarm is giving you 3 long beeps, a pause, 3 long beeps, a pause, with a voice saying "Fire! Fire!" and there is no fire then false alarms are most commonly caused by something interfering with the sensor. To clean the alarm, hold the unit by its edge and thoroughly blow through the gap on the side of the unit with compressed air (like keyboard cleaner). We recommend cleaning out all of your smoke alarms at least every 6 months to a year and at this point we would recommend cleaning out all of your other alarms as well as a preventative. Some of your alarms may be in one the locations to avoid listed in the owner's manuals. This would especially include alarms being installed within 3 ft (.9m) of a forced air supply ducts used for heating or cooling, ceiling or whole house ventilating fans, or other high air flow areas. We recommend that alarms not be installed near vents, flues, chimneys, or fans. We recommend that alarms not be installed near doors or windows near areas directly exposed to the weather. We strongly recommend not to install these alarms in garages, attics, and crawl spaces as you will get temperatures, dust, insects, and chemicals that can cause nuisance alarms. If the alarm is giving you 4 quick beeps, a pause, 4 quick beeps, a pause, with a voice saying "Warning! Carbon Monoxide!" then that is the signal for carbon monoxide. Never ignore a CO alarm. A true alarm is an indication of potentially dangerous levels of CO. CO alarms are designed to alert you to the presence of CO before an emergency – before most people would experience symptoms of CO poisoning, giving you time to resolve the problem calmly. If you suspect CO poisoning, move outside to fresh air and get emergency help. When your carbon monoxide alarm sounds, perform the following steps: On the alarm, press the TEST/RESET button. Call emergency services; either 9-1-1 or your local fire department. Immediately move to fresh air; either outside or near an open door or window. Ensure that everyone in the structure has been accounted for. Do not enter the premises and move away from an open door or window until emergency services have arrived, the structure has been aired out, and the alarm has returned to its normal condition. If after following these steps the alarm still reactivates within a 24-hour period, repeat the steps and call a qualified appliance technician to investigate the structure for sources of carbon monoxide, and verify that the alarm system is functioning properly. Any problems should be immediately corrected. If this doesn't correct the issue, please call us with the alarm in hand at 1-800-880-6788.