Backup in a Box The alarm is sounding on the Backup in a Box – Float Switch robcooper Oct 16, 2023 // Modified 12 months ago Check the float switch on the control unit Is the cable for the float switch connected to the control unit? This could have been accidentally unplugged. If it isn’t plugged in then please plug it in and restart the control unit. Did this help? YESNO Tags: Backup in a Box