uPVC Door Won't Lock or Close? Common Causes & Fixes
Why your uPVC door is hard to lock, won't latch or sticks — and when it needs a locksmith rather than a new lock.
Dropped or misaligned door
uPVC doors move with temperature and age. When the door drops, the hooks and rollers on the multi-point lock no longer line up with the keeps on the frame — so the handle is stiff or won't lift.
Signs to watch for
You have to lift or push the door to lock it, the handle feels heavy, the latch doesn't catch, or there's a draught at one corner. Fix it early — forcing the handle can snap the gearbox.
Adjustment vs replacement
Often all you need is a hinge and keep adjustment, which a locksmith can do in one visit. If the gearbox has failed, the door may be stuck locked — that's an emergency job, and the mechanism is replaced in place.