Reinstall door sensors and smart locks precisely so security features work reliably after a door jamb replacement.

Start by identifying each component and its mounting orientation before you remove anything, and mark positions with painter s tape and a pen so you know exactly where sensors and the strike plate sat. For recessed magnetic sensors measure the depth and width of the new jamb mortise and transfer those measurements so the sensor sits flush and the magnet aligns within a quarter inch when the door is closed. For surface sensors use corrosion resistant screws and the same height and lateral spacing you recorded, and tighten until the housing is snug but not deformed. For smart locks verify the bore hole alignment and backset distance match the lock cylinder and deadbolt specifications, then secure the mounting plate to the jamb with the recommended torque so the tailpiece engages the lock mechanism smoothly. Reconnect any wired sensors paying attention to polarity and wire strain relief, and for battery powered devices use fresh batteries and confirm contacts are clean. Finally run the lock and sensor through their factory calibration routine or manual alignment steps and perform at least five complete open and close cycles while observing sensor state and lock actuation to confirm consistent operation.

Common mistakes include misaligned magnet and sensor which causes false open events, so recheck your marks and use a spacer shim to fine tune lateral position until you see a stable closed reading. Another is overtightening screws which can bend plastic housings or bind the lock mechanism, so tighten incrementally and test after each adjustment to avoid deformation. The third is skipping a connectivity or battery test which leaves the system offline, so after physical installation perform a wireless or hub pairing check and replace batteries with fresh cells if signal strength is weak.

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