WiFi Not Working After Power Outage: Quick Fix Guide

The power comes back on, but your WiFi doesn't. This is one of the most common troubleshooting calls we get — especially in New England where storms knock out power regularly. The good news: most of the time, it's a simple fix. Here's what to check, in order.

Step 1: Check Your Modem First

Your modem (the device from your ISP — Cox, Verizon, Comcast, Optimum, etc.) is the connection between your home and the internet. After a power outage, it needs to re-establish that connection, which can take 2–5 minutes.

• 1.Find your modem (usually has coax or fiber cable going into it)
• 2.Check its power light — it should be solid (not blinking)
• 3.Check the "Online" or "Internet" light — this should also be solid
• 4.If lights are blinking or off, unplug the modem power for 30 seconds, then plug back in
• 5.Wait 3–5 minutes for it to fully reconnect

Step 2: Restart Your Router

If your modem looks good but WiFi still isn't working, restart your router (the device that creates your WiFi network — this may be separate from your modem or a combined unit):

• 1.Unplug the router power
• 2.Wait 30 seconds (this clears the memory and allows a clean boot)
• 3.Plug it back in
• 4.Wait 2–3 minutes for WiFi to come back

Important: Always restart the modem first, then the router. If you restart them simultaneously, the router may boot faster than the modem and fail to get an internet connection.

Step 3: Check for Area-Wide Outages

Power outages can also knock out your ISP's local equipment (the node or cabinet that serves your neighborhood). Even after your power returns, the ISP's infrastructure may still be down or rebooting.

• →Check your ISP's outage page or app (Cox, Verizon, Comcast all have these)
• →Use your phone's cellular data to check — you can't check WiFi issues on WiFi
• →If there's an area outage, you just have to wait — no amount of rebooting will fix it

Step 4: Check for Power Surge Damage

Power surges during outages and restorations can damage network equipment. Signs of surge damage:

• !Router or modem won't power on at all
• !Power light comes on but no other lights
• !Burning smell from any device
• !Ethernet ports on the router or switch stopped working

If your modem was damaged, call your ISP — they'll replace it (it's usually their property). If your router was damaged, it needs to be replaced. This is a good argument for using a quality surge protector for all network equipment.

Step 5: PoE Switch and Access Points

If you have a professional WiFi installation with a PoE switch and multiple access points (like a UniFi system), the switch may need a restart too. The restart order matters:

1. Modem (wait until online light is solid)
2. Router/gateway (wait until fully booted)
3. PoE switch (this will power-cycle all access points automatically)
4. Wait 3–5 minutes for all access points to come back online

With a UniFi system, you can check the controller dashboard to see the status of all access points. If everything shows "Connected" but you still can't get online, the issue is likely at the modem/ISP level.

Preventing Future Issues

• ✓Use a UPS (Uninterruptible Power Supply) — keeps your modem and router running during short outages and prevents surge damage
• ✓Surge protector — at minimum, put all network equipment on a quality surge protector
• ✓Professional-grade equipment — enterprise gear handles power events more gracefully than consumer routers

Related Reading

• Our Network Troubleshooting Service
• Why Your WiFi Keeps Dropping (And How to Fix It)
• WiFi Dead Zones: Why They Happen and How to Fix Them
• WiFi Upgrade Service