If your timer is running for only 1 second and then shutting off, it’s likely that your timer has the Rain Sensor terminals online.
Your B-hyve controller will prevent the system from running if your Rain Sensor is active. You will still be able to run your controller in a manual cycle, but your custom and Smart programs will not water. If you are experiencing this issue, you will need to turn off your Rain Sensor Terminals.
Follow the steps in the guide below to turn your Rain Sensor terminals off: