Mortise lock troubles

A contractor from New york says:
May 2, 2018
Lock keeps jamming. Sometime can?t turn the l lock keeps jamming. Sometime can?t turn the lot key or lock knob. Lock has marking, it reads AISD as shown in photo.
Thumbnail of the uploaded file named image.jpg
Thumbnail of the uploaded file named image.jpg
Thumbnail of the uploaded file named image.jpg
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Tom from SWISCO responded:
May 8, 2018

It definitely sounds like a problem with the mortise lock. Start by looking at our 40-194. Carefully compare our dimensions to your measurements and let me know how they match up.
Storm Door Mortise Latch
Storm Door Mortise Latch
40-194
$42.47
How to flip a storm door mortise latch.
How to flip a storm door mortise latch.
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