Fire Door Fault Finding: Why a Fire Door Won’t Close Properly

A fire door that won't close properly is one of the most common problems I come across. Sometimes the problem is obvious. Sometimes it isn't. You can have a door that closes perfectly one day and then starts catching the next. You can have a door that gets almost to the frame but stops short. You can have one that closes but needs a good shove. Or you can have a door that looks perfectly fine until you actually watch it operate. The important thing is not to start changing things at random. Find out why the door isn't closing properly first. That's what this fault-finding section is about. For a structured symptom-to-cause diagnostic route, see Fire Door FIX. Start with the symptom Before you start adjusting the door, describe exactly what it is doing. Is it: Not moving towards…