Hey Isabella,
It’s not uncommon to encounter installation issues with the Wheelock ELFHSW horn strobe. One common problem could be improper wiring connections. Ensure that the wiring is correctly connected to the device and the control panel. Also, double-check the voltage requirements to make sure they match the power supply. If everything seems fine with the wiring, try resetting the device by powering it off and on again. Sometimes, a simple reset can solve the issue. If the problem persists after these steps, it might be a defective device, and you may need to replace it.