I tried to lock/unlock my door but I see a constant red light on the bottom of the Kevo lock

This means that the battery in the Kevo fob is low and needs to be changed.

TO CHANGE THE KEVO FOB BATTERY:

1.  Use a small coin to twist and pry apart the two halves of the Kevo fob.

2.  Slide the battery out from between the two contacts.  Dispose of battery according to local laws and regulations.

3.  Insert a new CR2025 battery, sliding it between the two contacts so that the positive face of the battery touches the positive contact.

4.  Press the two halves of the Kevo fob back together, making sure they snap into place.

NOTE:  As with any lock, we recommend that you have access to a backup key at all times.