After all alarm control panels have been disconnected and removed remove the remaining components such as opening detectors motion detectors and glass break detectors via unscrewing or pulling nails.
How to remove old adt panel from wall.
Locate the main control unit.
Electronic home security systems alarms and devices adt contro panel removal for remodeling hopefully an easy one i am adding cabinets so the control panel has to come down.
Remove it from the wall.
There are two small slots on the bottom of the unit and my best guess is that a special tool a key is inserted into these slots to allow the unit to open up this person says putting a small screwdriver in each of the two slots will let you pry it away.
Many detectors will be attached with adhesive.
Depending on the model of the control unit this can be done by removing the main cover from the panel and then unscrewing the mounting screws underneath.
They can be removed by prying.