When we encounter the issue that the SwitchBot Lock fails to carry the thumbturn, we can follow the guide below to check for it.
1. Make sure both batteries are correctly inserted into the battery case. If there is only one battery installed, the SwitchBot Lock would not have enough power to do the job.
2. Make sure the batteries are in decent condition. If they are at a low battery level, the SwitchBot Lock would not have enough power to do the job either.
3. Please check whether the door lock has rust, aging or any other phenomena, which would make the SwitchBot Lock require a lot of force to operate, exceeding its maximum load force.