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How to Replace Lock in UPVC Door Many uPVC door mechanisms need regular maintenance to ensure they are in working order. The mechanism will last longer when you use a lubricant approved by the manufacturer. You can also save money on locksmith charges. It might be time to replace your uPVC lock if you find problems. Learn how to do it yourself with these steps! You can also find out more about It could be time to replace your uPVC lock if it's not functioning or is acting up. A damaged lock can be a hass