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How to Replace a UPVC Door Lock If you have recently moved to a brand new residence or had a burglary at your home, changing the locks on your doors is an important step in restoring security. However, the process isn't as daunting as it might seem. All you need is a bit of preparation and the right tools and a locksmith's visit could be avoided. Identifying the Issue It is important to recognize the indicators that indicate that the uPVC door lock is not working correctly. If you are having trouble tu