https://www.repairmywindowsand....doors.co.uk/southamp
Replacement Locking Mechanism For UPVC Doors If you hear an "tick tock" sound coming from your upvc door lock multipoint it could be a sign the gearbox inside the central case is not functioning properly. It could also be caused by a damaged handle mechanism. A new lock mechanism is usually needed to solve these issues. It is possible to do it yourself at a much less cost than an expert locksmith. Identifying the Problem If you've had issues with your uPVC door lock recently, don't assume that it's be