mortise lock part

A quick learner from USA says:
Hi,

I have a French sliding door, whose brass handle read "Sash Controls Ferndale MI, 2260 Taiwan". I am not able to use the switch (lever) on the handle to lock the door (the lever does not move the latch - I have to manually move the latch with my hand for now).

Please see the picture attached and advise me of the part number to order from your website.

Thanks!
french door handle
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Tom from SWISCO responded:
Check out our 82-229, this may be what you want.
How to maintain a sliding glass door
How to maintain a sliding glass door
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