Why my Range Extender is unable to detect 5GHz wireless network of my root router?

phenomenon:

• 5ghz frequency is not found when the extender scans for the host network;
• the range extender does not detect the router’s 5ghz wi-fi/5ghz hotspot wi-fi.

** if the range extender detects the 5ghz wi-fi of the host router but fails to connect to it / the 5ghz led is off after set up, refer to this faq.

troubleshooting suggestions:   

1.  locate range extender closer to the main router during setup.

2. confirm the router's 5ghz wi-fi is working fine and available on other wireless clients (laptops, mobile phones, etc.).

* if the router's 2.4g & 5ghz use the same ssid, please change a different ssid for 5ghz to exclude the issue. 

3. change a different 5ghz wireless channel on the main router:

if the main router’s 5ghz channel is set to auto or between 149-165, change it to a channel between 36-48.

here takes the tp-link router as an example, go to wireless settings >> 5ghz >> select a recommended channel, such as 48, then save and reboot the router.

note: the 5ghz wireless settings will vary on different manufacturer’s routers, please contact your router’s technical support for help. 

notice for the (eu )version of the link range extenders:

the range extenders with eu version, which can be verified by the device bottom sticker, only supports band 1/2/3, they don’t support band 4 channels on 5ghz  to comply with ce certification in europe. if your host wi-fi is fixed on band 4 channels, the tp-link range extender will not see it.

v band1: 36-48   (36,40,44,48)
v band2: 52-64   (dfs) 
v band3: 100-140 (dfs)
x band4: 149-165 (149,153,158,161,165)

related articles: 

1. for huawei router with airtel, refer to the thread shared by our community user.

2. brief introduction of dfs function.