Today something strange has happened to my front door lock.
It is a Mila 'Euro' cylinder lock operating the multi point locking system. The door was already unlocked and the key in on the inside. When I came to the door I put my key in the outside and tried to turn (nothing happended as it was already unlocked).
However, when I shut the door lifted the handle and turned the key to the lock position, the key didn't go past the vertical as normal and it was difficult to remove from the lock.
I have removed the cylinder lock and compared it to the one in my back door.
When the key is in the vertical position, the cam is at about the 10 o'clock position when looking along the cylinder from the 'inside' end.
My back door cylinder works fine in the front door lock mechanism and the cam is at the 5 o'clock position when the key is vertical.
Clearly and by some mystery, the cam has changed positions in a rotational way from it's normal position.
How do I get it back to the correct position that will allow easy key removal when in the locked state? I've tried looking on internet to no avail.
The house is secure, just the key is Very difficult to remove from the lock, as it won't go past the vertical to allow easy removal. It's as if it is tight against the locking mechanism of the gearbox thing.
Is a generic picture. The black cam is the normal position (ie on back door lock) and the red is my front door lock cam position.