On 11 Jun, 19:37, Lobster wrote:
Is this when you are locking the door, or just opening/closing it?

Both.

Also, what happens if you work the mechanism with the door hanging open
(ie, when the bits aren't engaging with the door frame)? Are tye
symptoms the same, or do they go away?

The same. I assume with my luck that means the entire thing is FUBAR,
requiring a total house rebuild. At least, that's the way it's been so
far this week, and it's only Tuesday!
--
Dave Jennings