You did not indicate whether the problem exists only if the door is closed, or also if it operates in the same manner when the door is open. If it is only a problem when the door is closed, then you probably have a misalignment between the lock and the strike mounted in the door frame.
Here is a link to the installation instructions for the Powerbolt. It is a PDF file, requiring Adobe Reader or similar is installed on your computer:
Answers & Comments
You did not indicate whether the problem exists only if the door is closed, or also if it operates in the same manner when the door is open. If it is only a problem when the door is closed, then you probably have a misalignment between the lock and the strike mounted in the door frame.
Here is a link to the installation instructions for the Powerbolt. It is a PDF file, requiring Adobe Reader or similar is installed on your computer:
http://www.weiserlock.com/PDFs/install_sheets/pb_eng_install.pdf
If the problem is not due to a misalignment, then I suggest that you contact Weiser Customer Service:
http://www.weiserlock.com/en/CustomerService/ProductSupport/SupportContact.aspx
They have toll-free assistance numbers.
Good luck!