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How to Replace a Replacement Upvc Door Lock Mechanism Installing a new door lock made of upvc could be a great option to boost the security of your home. It is important to identify the type of uPVC door lock you have to find a replacement. Broken hinges or pressure can cause uPVC mechanisms to stick. The easiest solution is to lubricate the hinges. Identifying the Manufacturer The first step to replacing the uPVC lock mechanism is to identify the manufacturer. This can be done by inspecting the lock and