Internet Keeps Cutting Out: Causes and How to Fix It

Quick Diagnosis: Identify Your Drop Pattern

Match your symptom to the most likely cause to skip the wrong fixes:

The 6-Step Fix (In Order)

Step 1: Check the obvious things first

Before anything technical:

• All cables (modem power, modem-to-router, ISP coax/fiber/phone) firmly seated. Wiggle each to confirm.
• Power LEDs solid green / blue, not blinking abnormally. Check our router lights guide.
• No surge protector or UPS in line that's failing. Try plugging the modem directly into the wall outlet.
• Confirm the issue exists on multiple devices (rules out one device's WiFi adapter).

Step 2: Test your router

Most "internet keeps dropping" complaints are actually WiFi or router problems, not internet problems.

1. Plug a laptop into the router's LAN port with Ethernet. Run a continuous ping test (ping 8.8.8.8 -t on Windows; ping 8.8.8.8 on Mac/Linux). Watch for "Request timed out" or "Destination Host Unreachable" lines. If wired ping is solid but WiFi drops, the router's WiFi is the issue.
2. Restart the router properly. Unplug for 60 seconds, plug back in, wait 2 minutes for full boot. Test for the next hour.
3. Update router firmware. Bug fixes for connection drops are common in firmware updates. See our firmware update guide.
4. If router is more than 4 years old: consider replacing. Aging routers develop heat-related instability that no software fix resolves. See our best WiFi router guide.

Step 3: Eliminate device-specific issues

If only one device experiences drops, the problem is that device, not your network:

• Update WiFi driver / OS: Outdated drivers cause connection drops. Update via Device Manager (Windows) or System Settings (macOS).
• Forget and rejoin the WiFi network: Resets the device's stored credentials and connection profile.
• Disable WiFi power management: Some laptops aggressively turn the WiFi adapter off to save battery, causing drops. Disable in Device Manager > network adapter > Power Management on Windows.
• Try the 2.4 GHz network: If 5 GHz drops in a far room, the device may not have a strong enough 5 GHz signal. 2.4 GHz reaches further.

Step 4: Test the modem (cable / fiber / DSL)

This is where most "internet keeps cutting out" issues are actually rooted.

1. Bypass the router. Connect a laptop directly to the modem with Ethernet (the modem's LAN port). If drops still happen, the router is innocent — it's the modem or the line.
2. Check modem signal levels. Most cable modems have a status page at 192.168.100.1. Look for downstream/upstream power (should be -7 to +7 dBmV ideally) and SNR (should be 35+ dB). Out-of-range values mean the line is noisy and your ISP needs to fix it.
3. Restart the modem. Unplug for 5 minutes (longer than router — drains capacitors fully), plug back in, wait for online lights. Test for the next hour.
4. Modem temperature. Touch the modem. If it's hot enough to be uncomfortable to touch, it's likely overheating. Move to a cooler location or improve airflow. Overheated modems are a top cause of intermittent disconnects.
5. If modem is rented and old: Ask your ISP for a swap. Newer modems often resolve drops immediately. If you own your modem and it's 5+ years old, replace it.

Step 5: Check the line / cabling

Physical line issues cause drops that no equipment swap can fix:

• Coax cable (cable internet): Inspect from the wall to the modem. Bent, kinked, or visibly damaged cable causes signal loss. Old splitters degrade signal — remove unnecessary splitters in the line.
• Phone line (DSL): DSL is sensitive to line quality. Long phone runs, splitters without DSL filters, and old in-wall wiring all cause drops.
• Outside lines: Drops after rainstorms or temperature changes often mean water has gotten into a connector or junction box outside. ISP technician needs to inspect.
• Construction or pets: Animals chewing on outdoor coax happens more than you'd expect. Inspect outdoor cabling for visible damage.

Step 6: Confirm if the ISP is at fault

If equipment and cabling check out, the issue is upstream:

• Ask the ISP to pull your modem's signal log. They can see uncorrectable codeword errors, T3/T4 timeouts, and SNR drops over the past 24 hours. This data tells the truth about line quality.
• Check ISP outage maps. downdetector.com aggregates user reports; ISPs publish maintenance schedules at their support pages.
• Ask if your area has a node split planned. Cable ISPs split overloaded neighborhood nodes when peak-hour congestion is too high. They'll often confirm if congestion is causing your drops.
• Request a tech visit if signal levels are out of range. ISPs are obligated to deliver signal within spec — out-of-range values are their problem, not yours.

Document the Drops Before Calling Support

ISP support is much more responsive when you have hard data:

• Run a continuous ping test (ping 8.8.8.8 -t) and let it run for hours. Screenshot the timeouts.
• Note the exact time of each drop. ISPs match this against their network logs.
• Keep your modem's signal levels page open in a tab. Screenshot it during a drop.
• Record date, time, duration, and what you were doing. Patterns become obvious — drops only at 8 PM, drops only when raining, drops only on the upstairs router.

What Doesn't Help

• Buying a more expensive router. Won't fix modem or ISP-side drops.
• Switching DNS providers. Doesn't affect connection drops, only DNS resolution speed.
• Adjusting MTU or other obscure settings. Almost never the cause of drops on a properly working network.
• Reinstalling Windows / wiping your phone. If the issue is on multiple devices, the device isn't the problem.

When to Escalate

If you've gone through all six steps and the drops persist:

• Demand a line tech visit, not phone troubleshooting. Persistent drops despite home-side fixes mean the line itself needs inspection.
• Get a service ticket open. Reference the date / time logs you captured.
• Ask for a credit if drops persist beyond 24 hours. Most ISPs will credit when documented outages exceed thresholds.
• Switch ISPs if available. See our providers in my area guide — sometimes the only real fix is a different provider.

Frequently Asked Questions

Why does my internet randomly cut out?

Random disconnects usually come from one of three sources: equipment problems (overheating modem, dying router, loose cable), line problems (water in cable, signal noise, distant DSL), or ISP-side issues (peak congestion, planned maintenance, neighborhood node failure). Test from a wired connection during a drop to isolate which one.

How do I tell if it's my router or my ISP?

Plug a laptop directly into the modem with Ethernet, bypassing the router. If the connection still drops, the issue is the modem or the line — call your ISP. If it stays stable, the problem is your router or WiFi. The simplest DIY test for any 'is it me or them' question.

My internet drops for a few seconds, then comes back. Why?

Brief drops (5–30 seconds) followed by automatic recovery usually mean your modem is renegotiating with the ISP — common with DOCSIS cable when signal noise crosses a threshold. If it happens multiple times an hour, ask your ISP to check signal levels at your modem (downstream/upstream power and SNR).

Why does my internet keep dropping at the same time every day?

Repeating-time drops are usually peak-hour congestion (everyone in the neighborhood streaming at 8 PM) or scheduled maintenance / DHCP lease renewals. Cable ISPs especially see node congestion at consistent times. Your ISP can confirm whether your area has a capacity issue.

Should I replace my modem if it keeps disconnecting?

Probably yes if the modem is more than 5 years old or runs DOCSIS 3.0 (the current standard is 3.1). Aging modems' analog front-ends drift out of spec, causing random renegotiations. Before replacing, ask your ISP to check signal levels — if they're out of range, it could be the line, not the modem.