Sliding door lock broken

A friend from Watertown, CT says:
I don't know the manufacturer of the door but the lock won't work. I'm not sure if the whole thing needs to be replaced. I remembered it working for a while then all of a sudden it didn't work anymore and it seems like I'm the only one who remembers it working and the only one who wants to get it fixed. This would be a great help as this has been driving me crazy. It looks like you guys are really good with answering questions so i hope you can help me.
User submitted photos of patio door hardware.
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Paul from SWISCO responded:
Start by looking at our 82-001K handle set. This appears very similar to your handle, but let me know what you think.
A quick learner from Watertown, CT says:
The measurements match up perfectly. I didn't think it would be so easy to find the lock i was looking for. One problem was that i wasn't able to measure the bottom of the lock in 16ths. It measured at 7/8 but i assume that it would measure up to 15/16 if i had the right tool for it. Is this a simple set up where you just unscrew the old one and screw in the new one?
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Paul from SWISCO responded:
Yep! Installing this kind of handle set is fairly straightforward. If you need help, though, let me know and I'd be happy to assist you in any way I can.
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