Is it a wear and tear issue or an adjustment that's needed?

I don't know for sure, but sometimes (rarely) I can get the lock to work. That makes me think it's an adjustment issue.
Dave

I'd contact Loewen customer service or a local dealer via their website.

Here is a link that might be useful: Loewen

Thanks for the reply. I called the local Loewen distributor (from whom I bought all the Loewen doors and windows in my house six years ago)and he gave me the number of his repairman. I called him and he said it would be $120 for the visit and if he couldn't repair it on his first visit, he would have to charge me again.

I will contact Loewen and see what they have to say.
Dave