Today a customer contacted me and said that he could not open the door. The key in the cylinder turns, but the door does not open. I immediately realized that the problem was in the mechanism, since a high-security cylinder was installed in the door and it could not break. I came to the customer, opened the door, changed the mechanism to a new one and, of course, adjusted the door. The customer was satisfied. The reason for the mechanism failure was that the customer could not turn the key and turned it too hard. As a result, he broke the mechanism inside. Let's summarize. In most such cases, when you cannot close the door with a key, you only need to adjust the door and there is no need to pull the door handle hard and try to turn the key by force.
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