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A customer in Portstewart recently contacted Lighthouse Locksmiths after experiencing problems with a UPVC back door that had become difficult to operate and eventually would not open at all. On arrival, it was clear that the multipoint locking mechanism had failed internally, leaving the door locked shut. This is a common issue with older UPVC doors, where the gearbox inside the mechanism wears out or breaks, preventing the handle and lock from operating correctly. To gain a