I have a double glazed back door with a multi turn lock. Sometimes, which seems be more regular, it will not unlock with the key. However I have unlocked the door now and I am about to disassemble the handle assembly to look at the barrel, but I suspect the problem is in the lock itself. I will need to take off the long metal strip on the end of the door, are there any pointers, like the internals falling to bits..?
Back not unlocking
Aug 21, 2022
Last reply: 3 years ago
2 Replies
I had that with my back door! Now, the internal parts could differ, but mine was due to a small screw that was loose and gradually coming undone and catching on the mech. The screw is visible in a small part of the movement of the handle and is difficult to get at - the slot showing needs a screwdriver that is narrower than the screw.
Thanks, I will look for it.
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