ASUS Router Keeps Dropping Connection — What Causes It & How to Fix It

What Does This Error Mean?

If your ASUS router keeps dropping the internet connection, it reconnects every few minutes or hours. This is usually caused by outdated firmware, overheating, ISP line issues, or incorrect WAN settings. Most fixes take under 10 minutes and do not require a technician.

Affected Models

ASUS RT-AX88U
ASUS RT-AX86U
ASUS RT-AX58U
ASUS RT-AC68U
ASUS ZenWiFi and most ASUS router models

Common Causes

The router firmware is outdated and has bugs affecting connection stability
The router is overheating and throttling or restarting its WAN interface
The ISP modem or cable line is intermittently dropping signal before it reaches the router
The WAN connection type is set incorrectly (e.g., DHCP when the ISP requires PPPoE)
DNS server settings are causing lookup failures that appear as disconnections

How to Fix It

Check if the issue is the router or your ISP. Plug a laptop directly into your modem with an ethernet cable, bypassing the router. If the internet still drops, the problem is your ISP line — call them.

This step tells you definitively whether the ASUS router is the problem or not.
Update the router's firmware. Log into the admin panel at 192.168.1.1, go to Administration > Firmware Upgrade, and check for updates. Install any available update.

ASUS regularly releases firmware updates that fix stability bugs. An outdated router is a very common cause of dropped connections.
Check if the router is overheating. The router should be in a well-ventilated area — not in a cabinet, not on carpet, and not stacked on other devices. The case should feel warm but not hot to the touch.

ASUS routers with upright antennas need airflow around the sides. Horizontal placement or enclosed spaces trap heat.
Verify your WAN connection type. Log into the admin panel, go to WAN > Internet Connection. Make sure the WAN Connection Type matches what your ISP uses. If unsure, call your ISP and ask whether you should use DHCP, PPPoE, or Static IP.

Using the wrong WAN type causes frequent reconnections as the router repeatedly tries and fails to authenticate.
Change your DNS servers. Go to WAN > Internet Connection > DNS Setting. Set DNS Server 1 to 8.8.8.8 and DNS Server 2 to 8.8.4.4 (Google DNS). Click Apply.

Your ISP's default DNS servers can sometimes be slow or unreliable. Google and Cloudflare DNS (1.1.1.1) are faster and more stable.

When to Call a Professional

If the connection drops persist after firmware updates and setting changes, contact your ISP. The problem may be on the line coming into your home. An ISP technician can test signal levels at the street and at your modem.

Frequently Asked Questions

My ASUS router drops connection at the same time every day. Why?

A daily disconnection at the same time is often caused by your ISP. Some ISPs reconnect or reassign IP addresses during off-peak hours (often late at night). This is normal for dynamic IP connections. If it happens at a random time every day, it may also be a scheduled router reboot (check Administration > System in the admin panel).

Will a factory reset fix dropped connections?

It can, if the issue is a corrupted configuration. However, factory reset should be a last resort after trying firmware updates and settings adjustments. Note down all your settings (Wi-Fi name, password, port forwarding rules) before resetting. After a reset, reconfigure from scratch and test stability.

How do I know if my ASUS router is overheating?

Touch the top of the router case — it should feel warm, like a phone charger, but not hot. The router should stay responsive with no LED anomalies. If the router feels very hot or the LEDs behave erratically before a disconnection, overheating is the likely cause. Improve ventilation and check that the router vents are not blocked.