Open the door fully and let it go. It should close at a steady, controlled speed and latch on its own without a final push or a slam. Time it if you can: a consistent closing time month to month is a good sign.
Look at the gaps. The space between the door and the frame should be even along the top and the latch side. A gap that grows wider at one corner points to pivot or hinge wear.
Check the hardware. Look for oil on or below the closer, loose screws on pivots and handles, and a lock that turns smoothly. Listen for squeaks or grinding as the door moves.
Note anything that changes and call before it fails. Regular maintenance visits handle the adjustments, lubrication, and early replacements that keep an entrance from becoming an emergency on a busy morning.