Door will not lock after a lock change: what to check
Use door-open testing to separate lock installation, bolt alignment, and smart-lock calibration problems after new hardware is fitted.
Test with the door open first
Operate the key and interior control normally while keeping the door open. A mechanical lock should not need excessive force. If it is motorized, follow the manufacturer's setup instructions and keep clear of the moving bolt.
Binding even with the door open can involve part orientation, incompatible components, mounting, or an internal fault. Return to the exact installation guide or contact the installer instead of changing the frame immediately.
Then check what changes when the door closes
Close the door gently and compare operation. If the bolt now strikes metal or wood, or the door has to be lifted to lock, the opening needs assessment. A newly installed lock does not correct a sagging hinge or a shifted frame.
Do not enlarge holes or modify a rated door based on guesswork. Schlage's deadbolt guide specifically calls for checking strike and jamb alignment when the bolt drags after closing.
| Observed behavior | Next check |
|---|---|
| Binds open and closed | Hardware fit, installation, and the correct instructions. |
| Smooth open; binds closed | Hinges, door position, strike, and bolt clearance. |
| Key works; motor reports a jam | Mechanical resistance and the model's setup/calibration. |
| Bolt moves but door is not secure | Whether the bolt actually enters the intended strike opening. |
Do not let the motor hide a fit problem
A smart lock should not be used to force a poorly aligned bolt into place. Correct the mechanical fit before repeating setup. Factory resets can remove useful settings without fixing the door.
If the old hardware worked and the new one does not, give the installer that history along with model numbers. Confirm the replacement is suited to the door thickness, preparation, and application.
Ask the installer to demonstrate the result
Test locking, unlocking, latching, and interior exit. Confirm that each issued key or user code works as intended. Ask for the model information, warranty terms, and any maintenance instructions.
Keep the old hardware until the new installation is accepted, unless the installer has an agreed disposal arrangement. A completed visit should leave a usable door, not only a new product attached to it.
Common questions
Will rekeying fix a new lock that will not close?
No, not if the problem is bolt alignment or installation. Rekeying changes the key combination; it does not correct the door's fit.
Should I reset a smart lock after every jam?
Start with the mechanical cause and the model's troubleshooting instructions. Repeated resets can erase settings while leaving the same resistance in place.
Manufacturer and standards sources
- Schlage: installing and testing a deadboltDoor-open testing and the importance of strike alignment.
- Schlage: troubleshooting a door that will not latchDoor fit, hinges, and strike alignment.
- Schlage: Encode smart-lock support and manualsModel-specific installation, Wi-Fi features, and programming documentation.
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