To instantly stop the noise, enter your user code and press "Off" or "Disarm." If the alarm keeps misfiring, quickly silence it by locating your main control panel (usually in a closet or basement), unplugging it from the wall, and disconnecting the backup battery leads.
In many cases, the issue is something simple, like a low or dead battery in a sensor, which can trigger both burglar and smoke alarms. Pets are another common cause. If you never calibrated your motion sensors after installing them or your motion sensors lack a pet-friendly setting, this is most likely your issue.
Wireless interference, loose connections and low batteries can all be guilty parties when an alarm is triggered in error. Power interruptions, which may occur during storms and high winds, can also set off your alarm.
Major Causes of False Alarms
Verify It's Not a False Alarm
Read any notifications or messages appearing on the keypad display (if it's nearby) and then investigate, however don't put yourself in danger to do so. If you suspect that there is an actual threat in the house, find a safe place to wait for the authorities.
To silence an alarm that is currently ringing, the fastest method depends on what is going off. Use the exact steps below based on your device:
Leaving a light on at night can deter burglars by eliminating dark hiding spots, but leaving the same light burning 24/7 can actually signal that you are not home. Security experts recommend specific lighting habits to maximize your home's safety:
The most common cause of false alarms is human error, accounting for roughly 50% to over 80% of all incidents, often involving untrained users, forgotten codes, or pets triggering motion sensors. Other leading causes include faulty or low batteries, faulty installation, dirty sensors, and environmental factors like steam or drafty windows.
If your house alarm randomly went off in the middle of the night, it is usually caused by environmental changes, sensor issues, or power fluctuations.
The standard cut-off time in the UK is typically 20 minutes. After that, the external siren stops automatically. The system itself may still be armed, but the noise will not continue. This is sometimes called the alarm cut off time UK, or external alarm bell time limit.
An alarm going off randomly is usually caused by an environmental trigger, a failing battery, a misaligned sensor, or dust and insects blocking the sensors.
If your fire alarm is randomly going off, it is usually caused by low batteries, dust buildup, humidity, temperature changes, or an aging sensor. If the alarm stops on its own and no smoke is present, it is typically not an emergency. However, repeated false alarms should always be investigated.
But what can you do about a neighbour's alarm that won't stop going off? If this is a persistent problem that happens on multiple occasions, you're best making a noise pollution complaint to your local council.
Over 98% of alarm calls per year in the USA are false.
False alarms are typically caused by human error, environmental factors like dust or steam, or equipment malfunctions. The most common triggers vary depending on the type of system you have installed:
A two-alarm fire requires assistance from other departments for a couple more pumpers and ladder trucks. Some will go to the scene and the others will cover our stations. A five-alarm fire requires a lot more assistance from the outside due to the large size of the fire.
Check for Dead Batteries
A dead battery in one of your components creates a gap in your home security system. Some systems will react to that by setting off an alarm, alerting you to potential problems. Other home security components may sound an alarm when the battery gets low. This is the case for some fire alarms.
To silence a house alarm fast, enter your 4-digit security code and press the "Off" or "Reset" key at the keypad. If that fails, perform a full hard reset by unplugging the main system transformer and disconnecting the backup battery leads.
Home Security Cameras
Our best deterrent for burglars is the presence of an outdoor security camera. Having cameras mounted around your exterior home is a great way to prevent burglars from entering your home! This immediately makes it look as though burgling your home will be more of a risk.
It's A Hassle
This is absolutely the number 1 reason we hear for not setting house alarms. It's just another step to remember when you're on your way out of the house, and if you're also trying to wrangle kids, pets or are simply in a rush, it feels impractical.
In the United States, between 94% and 98% of all burglar alarm activations are falsely triggered.
Burglars hate anything that increases the risk of being seen, caught, or delayed. Their ultimate deterrents are unpredictability and attention-grabbing obstacles.
Just like light exposure during the day helps you feel awake, this has the same effect at night—so it makes sense that looking at screens or keeping the lights on can make you restless and unable to fall fast asleep.
Burglars look for valuables in places they can access quickly, such as dresser drawers, under the mattress, in closets, and in obvious caches like cookie jars or desk organizers. They typically bypass areas that require physical labor, are messy to dig through, or offer low reward for their time.