First, ensure that the Gentex SSPKCLPW strobe light is compatible with your fire alarm system. Check the wiring connections to ensure they are secure and properly connected. If everything seems fine with the wiring, try testing the strobe by manually triggering the fire alarm system. If the strobe still doesn’t flash, there may be a fault with the device itself. In that case, I recommend contacting Gentex technical support for further assistance or considering a replacement.