There could be a few reasons why the Wheelock ELSPKWC-N speaker strobe is not flashing properly. Firstly, ensure that the wiring connections are secure and properly connected. Check if the device is receiving power by testing the voltage at the terminals. Additionally, verify that the device is programmed correctly according to the alarm system’s settings. If everything seems to be in order, it’s possible that the strobe itself is faulty and may need to be replaced. Feel free to reach out to our support team at firealarm.com for further assistance and troubleshooting guidance.