Verify that the lock can be operated smoothly with the key while the interior is removed. Remove the interior assembly from the door. Make sure the latch bolt can operate smoothly with the key and reinstall the interior assembly. If it is still unable to rotate, loosen the screws on the mounting plate and reposition the plate so there is no tension on the cylinder torque blade. If it is unable to rotate, remove the interior assembly from the mounting plate. Attempt to lock and unlock the door with the key. The mounting plate is placing tension on the torque blade.Make sure the hole in the door frame is drilled at least 1” (25 mm) deep. The hole in the door frame for the latch bolt is not drilled deep enough.If you have to push, pull or lift the door to get it to close, adjust the position of the lower strike. As a test, rotate the turnpiece on the deadbolt so the latch is retracted (unlocked), and close the door. The lower latch and lower strike (for your knob or lever) are misaligned, putting too much load on the deadbolt latch.Adjust the tab of the lower strike (for your knob or lever) to help align the upper latch and strike so that the latch bolt enters the strike when the door is locked. The deadbolt latch and strike are misaligned, causing the latch to bind.Replace with the new latch and reinstall the lock. Remove the lock from the door, including the old latch. If the latch being used is from an older lock, it will likely not have a tapered latch bolt. SmartCode deadbolts require a tapered latch bolt for ease of operation. The wrong deadbolt latch is installed.Disassemble the lock, and reinstall it without the adapter ring on the exterior side of the door NO- Remove battery pack, wait 15 seconds, then attempt the process again. YES- Door handing process was successful! Proceed to next step after latch bolt stops moving. Did the latch bolt retract and extend on its own when the battery pack was installed?.Hold button until the latch bolt starts moving on its own. Press and HOLD the Lock button while installing battery pack.Make sure the turnpiece is in the vertical position.Here are the instructions for the door handing: The door handing process was not executed during installation. On my Smartcode 909/910, the lock beeps, the keypad flashes red, and the door cannot lock.
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