Help installing Pro Power Kit

Hi. My existing chime only has 4 connections/wires. 3 connections are being used as shown in the photo. When I connect my power kit to connection 0&3 the doorbell rings when the sun goes down. When I connect to 0&2 the doorbell rings. Where do I connect the power kit?

Hi @user54953. I would first try to figure out the make and model of your chime and make sure it’s compatible with your Doorbell. If it’s the Pro, use this compatibility chart, and if it’s the Pro 2, use this chart. Once you find out if it is compatible, use this Help Center page on how to install the Pro Power Kit. If you are not sure what terminals would represent front and trans, I recommend reaching out to the manufacturer of your chime for help.