You do not need to fish the wires out from the wall.
Sliding patio door hook up alarm wire.
If the sensor is recessed you will need to pull it out from the door frame to access the screw terminals.
Remove the old sensor.
This location calls for a recessed contact and magnet.
Both wireless and hardwired sensors can be used for this purpose.
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Sliding glass doors should have wiring at the top if possible to allow making a vent zone later.
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Use a screwdriver to disconnect the wires from the old sensor.
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The best alarm contacts for sliding doors are skinny contacts that can properly fit on the door and its frame.
They can be used with the new.
Complete the following steps to replace wired door alarm sensors.
It is also very important to choose a door contact that is compatible with the alarm system that is being used.