If an electronic hotel door lock isn’t locking automatically, it might be due to a mechanical, sensor, or programming issue. Here’s how you can troubleshoot it:

1. Check Battery: Many electronic locks run on batteries. The batteries may die if the lock is not responding or functioning inconsistently. Some locks indicate low battery status by a flashing red light or a specific sound. If the batteries are accessible and you have replacements, try changing them.
2. Check Door Alignment: If your door or lock is misaligned, it can prevent it from functioning properly. Push the door tightly closed and try again, or look for obvious obstructions.
3. Check for Mechanical Issues: Inspect the lock and the latch/bolt mechanism. Make sure there are no obstructions or physical damage. The door must be properly aligned with the frame for the lock to work correctly.
4. Re-Initialize Your Key Card: Sometimes, the issue is not with the lock but with the hotel key card. The magnetic strip or chip could be damaged, or the card could have been incorrectly programmed. If you suspect this could be the problem, take the key card to the front desk and ask them to reprogram it.
5. Reset/Reprogram the Lock: If none of the above steps work, you may need to reset or reprogram the lock. Refer to the instruction manual for how to do this.
6. Call for Assistance: If none of these steps work, the best option is likely to call the front desk or the hotel’s maintenance staff. They’re trained to handle these situations and have the proper tools to help.

Remember, these are general suggestions. The solution might vary depending on the lock’s type and model, the hotel’s policies, and other factors.

Lastly, remember to check the warranty for your electronic lock. If the lock is faulty, you might be able to get it repaired or replaced under warranty.