Unquestionably, a red light indicates something is broken or dangerous, and the same is true of your router. Therefore, if you are also experiencing a problem with your Linksys router always flashing red, there may be some technical difficulties. However, it’s highly likely that the current modem has no internet connection or subscription. In this situation, talk with your ISP to determine whether it is operational or not. If it works but the red signal still comes on, restart the modem. Check the light indicator after a while and reconnect to the router as the Linksys router red light issue is fixed now.
