The second best location for alarm wiring is at the opening side about 18 above the floor.
Sliding patio door hook up alarm wire.
Using a surface mount magnetic door switch and will make this easier in most cases.
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Use a screwdriver to disconnect the wires from the old sensor.
The best alarm contacts for sliding doors are skinny contacts that can properly fit on the door and its frame.
In most cases it is wise to use a surface mounted sensor with a sliding door.
Sliding glass doors should have wiring at the top if possible to allow making a vent zone later.
They can be used with the new.
Both wireless and hardwired sensors can be used for this purpose.
This location calls for a recessed contact and magnet.
It is also very important to choose a door contact that is compatible with the alarm system that is being used.
Remove the old sensor.
You do not need to fish the wires out from the wall.
Complete the following steps to replace wired door alarm sensors.