Reasons Why the Wired Alarm Contact on a Door May Not Work

In this video, Joe explains why a hardwired door or window contact may not be working properly. One of the most common reasons is because the sensor and magnet are not aligned properly. Another possibility is that the sensor was not wired properly or because the wire from the senor has been damaged.

Door and window contacts are some of the easiest sensors to use with security systems. They consist of two parts, which are a larger sensor and a smaller magnet. The sensor is installed on the door or window frame, while the magnet is installed on the moving part of the door or window. There is a small metal reed switch inside the sensor. When the magnet is separated from the sensor, the metal reed switch is released. The sensor then knows to let the system know that the door or window has been opened.

With a wired door and window sensor, you need to run a wire from the alarm control panel to the sensor. If the wire ever becomes cut or damaged, then it will prevent the sensor from working properly. In that case, you would need to replace the wire with a new one. Another possibility for a faulty door and window contact is that the sensor and magnet are not properly aligned. If that happens, then the reed switch will remain released even when the door or window is closed.

You must remember to test a door and window contact sensor after one has been installed. This is the best way to make sure that the sensor and magnet are properly aligned. You must also make sure that the sensor and magnet are close enough together. Most door and window contacts will allow for a maximum magnet spacing gap of one-half to three-quarters of an inch. This will depend on the sensor itself, the strength of the magnet, and the type of surface the sensor is mounted on.

https://www.alarmgrid.com/faq/why-does-the-wired-alarm-contact-on-my-door-not-work

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