Frequently Asked Questions
Did this key EVER work well in this lock?
If it turns easily with the door open then perhaps one of the hinge screws is loose and the door is sagging. Try tightening the hinge screws.
If that does not work, have you installed weather stripping that might have changed the position of the lock to the lock strike plate causing it to rub? This can be handled by a strike adjustment, sometimes we must grind the strike a bit to accommodate the new position.
Usually, the simplest solution is that the lock needs lubrication.
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We recommend the FTC's guide on hiring a reputable locksmith.