Sometimes A Door Must Be Repaired
If you expect a door closer to consistently close the door, the door must be able to close properly. If there is a hinge problem, a warped door, or the door must swing uphill to close, a door closer will only go so far to solve the problem. Sometimes a door must be repaired before it will close and lock automatically with a door closer.
In vestibule conditions there is an exterior door, a small space, and then an interior door. The trapped air between the inside and outside door can be a factor in door closing. Wherever air pressure is a factor, including negative or positive pressure situations, The slow swing-speed seems to give the air a chance to get out of the way and the fast latch speed gives it a very slight slam at the end to make sure it latches.
If the closer stops closing the door before it’s closed all the way, or actually spings back when you try to manually shut the door, the arm is probably installed on the shaft incorrectly.
Door Closer’s Arm Makes Noise
If the arm makes noise and bounces up and down while the door is in motion, tighten the fasteners that hold the arm to the closer, to the header, and at the knuckle that holds the two parts of the arm together.
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