Night latch jamming

2 Sep 2018
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United Kingdom
We fitted a nightlatch with a Yale smart lock which is behaving inconsistly.

It sometimes jams and it sometimes does not engage.

Any troubleshooting tips?

Here is an example of it jamming:

In this case it eventually unjams after many tries.

Yale have asked me to check the tailbar, but have not really said what I am looking for...
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For anybody else who has this problem: we reread the instructions and noted that our nightlatch was a right turn only one. However, we had not installed the plate which prevented left turns. It looks like successive left turns rotated the nightlatch into a position where it could not turn left anymore.

We have now installed the guiding plate which came with the Yale unit and also filed flat the tailbar.

Will post back here if we see any more problems.

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