UPVC SPECIALISTS

Gearbox Description

The gearbox in a uPVC door is essential for the locking system's functionality. Located within the door frame, it converts the action of a key and handle into a secure locking or unlocking mechanism. This component contains various gears and levers that work together to engage latches or bolts, ensuring the door remains closed and protected.

Mechanism Description

In uPVC doors, the mechanism refers to the complete locking strip that includes the gearbox. This integrated component connects various locking points and cannot be separated from the rest of the system. It works by coordinating multiple latches and bolts to engage when the handle is operated, providing improved security. If the mechanism becomes misaligned or fails, it may affect the door's functionality.

Handle Sticks When Lifted

Problem: If lifting the handle feels stiff or sticky, this is often an alignment issue.
How to Check: Open the door fully and try lifting the handle. If it moves smoothly when the door is open, the mechanism itself is likely fine, and the problem is with the door’s alignment.
Solution: Adjusting the door’s hinges or repositioning it within the frame should fix this.

Cylinder Spins 360 Degrees

Problem: When the lock cylinder rotates all the way around without catching, it’s a sign it’s not engaging with the internal lock mechanism.
Solution: This usually means the cylinder needs replacing, as it’s not connecting properly.

Jammed Cylinder

Problem: A cylinder that’s jammed or hard to turn might be stuck due to wear or debris.
How to Check: Remove the cylinder from the door mechanism and test it on its own. If it operates smoothly outside of the mechanism, then the issue is likely with the internal parts of the door mechanism rather than the cylinder.
Solution: You may need to repair or replace the internal mechanism if this keeps happening.

Handle Spins or Feels Loose

Problem: A handle that rotates freely or feels wobbly generally points to an issue with the gearbox or central mechanism.
Solution: First, see if the gearbox can be removed from the mechanism. If it can’t, then a complete mechanism replacement may be necessary.

Typical Signs Of Mechanim Issues