GETTA Help

UPVC door won’t lock: common causes

A UPVC door that will not lock may be out of alignment or have a failed handle, gearbox, cylinder or multipoint mechanism.

Likely causes

  • Heat movement, hinge wear, frame settlement and mechanism failure can stop locking points engaging.

Safe checks you can make

  • Check whether it locks while open without forcing the handle, and look for obvious obstruction in the frame keeps.

When to stop and get urgent help

  • Do not leave an external door unsecured; arrange prompt help and use another secure exit if available.

How a locksmith can help

  • A locksmith experienced with multipoint locks can diagnose alignment separately from component failure.